Set your categories menu in Theme Settings -> Header -> Menu -> Mobile menu (categories). Yes CH2Cl2 is polar because its molecular structure is not We aim to make complex subjects, like chemistry, approachable and enjoyable for everyone. A single bond means two electrons, in the above structure, four single bonds are used for connecting the two chlorine and two hydrogens atoms to the carbon central atom. SMOJ. In case, you have questions floating in your mind, please let me know. Carbon has four valence electrons, Hydrogen has one valence electrons and like all halogens, Chlorine has seven valence electrons. The first step is to determine how many electrons are in the CH2Cl2 Lewis structures outermost valence shell. Out of all these atoms, Carbon is the least electronegative one, and hence we will place it in the central position. So it fulfills the octet rule and the carbon atom is stable. Methylene chloride, also known as Dichloromethane (DCM), is an organic chemical compound. Required fields are marked *. The carbon atom completes its molecular stability in the CH2Cl2 molecule because it possesses 8 electrons in its bond pairs with two chlorine and two hydrogens in the outermost valence shell. Here the electrons shared by the Carbon lead to the formation of four hybridized orbitals, which include one s-orbital and three p-orbitals. "acceptedAnswer": { Hence there is no change in the above sketch of CH2Cl2. The difference in electronegativity can be estimated using the method below. There are some exceptions to this octet rule, e.g., Hydrogen. Correct Lewis Structure for CH2Cl2. Valence electrons are the sum total of the electrons every molecule has in their outer shell in a compound. ii. Step #1: Calculate the total number of valence electrons. To calculate the valence electron of each atom in CH2Cl2, look for its periodic group from the periodic table. Examples: CH 4, NH 3, I 2. Bonding electrons around hydrogen(1 single bond) = 2. Identify the number of electron groups around a molecule with a tetrahedral shape. Therefore there are two more electrons which comes from outside to contribute to the total valence electrons. The main idea is that in order to form a bond, each atom has to donate an elec. For detailed information, you must read out an article on the polarity of CH2Cl2. To calculate the formal charge on the central carbon atom of the CH2Cl2 molecule by using the following formula: The formal charge on the carbon atomof CH2Cl2 molecule= (V. E(C) L.E(C) 1/2(B.E)), V.E (C) = Valence electron in a carbon atom of CH2Cl2molecule. How to tell if a molecule is polar or nonpolar? The extent of mixing and thus the contribution of individual atomic orbitals to form a particular molecular orbital depends on the relative energy alignment of the atomic orbitals. Carbon is a group 14 element on the periodic table. the octet rule and formal charges need to be satisfied. Chlorine is the second member of the halogen family. Draw the lewis dot structure for CH2Cl2. To complete the octet of the chlorine atom, a chlorine terminal atom requires one electron. The central atom is the one that has the highest bonding capacity; it is the atom that is the shortest of the octet. (ignore the ">" without them the formatting is off because 1. In the following computation, the formal charge will be calculated on the central carbon atom of the CH2Cl2 Lewis dot structure. Dichloromethane or methylene chloride, with the chemical formula CH2Cl2, is a colorless, volatile liquid with a boiling point of 39.6 C. The carbon atom has an electronegativity of 2.55, while chlorine has an electronegativity of 3.16 in the CH2Cl2 molecule. In the CH2Cl2 Lewis structure diagram, the carbon atom can be the center atom of the molecule. Electrons are represented as dots, and each pair of bonding electrons between two atoms is shown as a line. The bond angle of H2O2 in the gas phase is 94.8 and in the solid phase, it is 101.9. While selecting the center atom, always put the least electronegative atom at the center. As you see in the above figure, we have placed the 6 electrons represented as dots around both chlorine atoms. arrow_forward Start typing to see posts you are looking for. As per this theory, the electrons in a molecule are not individually assigned to atomic orbitals but to molecular orbitals. This molecule has a tetrahedral shape, and the central carbon atom has sp3 hybridization. The total valence electron available for drawing the CH2Cl2 lewis structure is 20. The difference in electronegativity of Chlorine and Carbon = 0.61. The preparation of CH2Cl2 involves a high-temperature treatment of methane or chloromethane with chlorine gas. Lets check the video to get an idea of the geometry and bond angle of CH2Cl2. Next, we shall figure out the central atom to which the rest of the atoms shall be bonded. Stannous chloride, SnCl 2 is a white crystalline compound with molar mass 189.6 g/mol. It is polar because of the presence of . but not soluble in water. As the Carbon atom needs 4 electrons to complete its octet, all the valency is satisfied, and it now has eight electrons in its valence shell. Two electrons are shared between the C atom and each H and Cl. See Answer. Learn how your comment data is processed. Finally, you must add their bond polarities to compute the strength of the C-Cl bond (dipole moment properties of the CH2Cl2 molecule). Methylene chloride, also known as Dichloromethane (DCM), is an organic chemical compound. This means that the bond angles and bond lengths in CH2Cl2 are not identical; however, all bond angles are identical in CH4. The goal is to obtain the "best" electron configuration, i.e. Hence, the valence electrons present in carbon is 4 (see below image). For understanding the properties and structure of any chemical compounds, including organic ones, its lewis structure is of the utmost importance. L.E(C) = Lone pairs of an electron in the carbon atom of the CH2Cl2 molecule. There are no resonance structures for CH2Cl2. Count total valence electron in CH2Cl2. In Lewis structure, we use dots to represent electrons and lines to show bonds formed between two atoms. Total no of valence electrons of CH3Cl = Valence electrons of Carbon + Valence electrons of Hydrogen + Valence electrons of Chlorine, Valence electrons of Hydrogen: 1 * 3 = 3 electrons ( as there are three hydrogen atoms, we will consider valence electrons of all the Hydrogen atoms ), Valence electrons of Chlorine: 7 valence electrons, Total no of valence electrons of CH3Cl= 4 + 3 +7. The bond angle of the Cl-C-H bond in the tetrahedral molecular geometry is approximately109.5 degrees. In the Lewis structure of CH3Cl, Carbon is at the central position and all the other atoms around it. Electron filling starts from the least energetic molecular orbital. Sulfur dichloride is polar with a 0.54d dipole moment. The structure of stannous chloride is angular or v-shaped with two bond pair and one lone pair. Is this molecule polar?Select one:and why ?a. An electron from the 22 orbital and three other electrons from 2p orbitals participate in forming bonds. This happens because it tries to achieve the same valence electron configuration as inert gases. Total valence electrons given by sulfur atom = 6. The premise of molecular orbital (MO) theory is that all the constituent atoms contribute towards the formation of molecular orbitals, which are a linear combination of the atomic orbitals. Similarly, the atomic number of hydrogen is 1; thus, each H has 1 electron and needs 1 more to achieve the duplet. The carbon (C) atom is kept at the central position and other atoms are at the surrounding position. Therefore,(4 single bonds 2) = 8 valence electrons are used in the above structure from the total of 20 valence electrons available for drawing the lewis structure of CH2Cl2. The compound has twenty valence electrons, out of which eight electrons participate in bond formation. To understand its chemical properties and physical properties, one needs first to know the Lewis structure and molecular geometry of CH. According to VSEPR theory, four bonding regions around the central atom will adopt a tetrahedral geometry. A step-by-step explanation of how to draw the CH2Cl2 Lewis Dot Structure (Dichloromethane).For the CH2Cl2 structure use the periodic table to find the total . Now count the valence electron used in the above structure. In the Required fields are marked *. Indicate whether each covalent bond is polar or nonpolar. A Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. As there are three hydrogen atoms, we will first put these atoms around the Carbon atom. But before looking at that, let us first discuss the valence electrons present in this compound as these electrons are the ones that form bonds. Also, Chlorine is a group VIIA Its chemical formula is CH2Cl2. There are four oxygen atoms in SO 42- ion, Therefore. Because of this difference in electronegativity, the CH2Cl2 molecules C-Cl bond becomes polar. We'll put two valence electrons between atoms to form chemical bonds. The Lewis structure of the methane (CH4) molecule is drawn with four single shared covalent bonds between the carbon and hydrogen atoms each. The molecular geometry or shape of CH2Cl2 is Tetrahedral, since, there are 4 regions of electron density around the central atom, and all the regions are bonding regions. The following table lists this informationon the basis of VSEPR theory for various molecular stoichiometries. The following is an example of how to draw the "best" Lewis structure for NO3- (learning by example). document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Topblogtenz is a website dedicated to providing informative and engaging content related to the field of chemistry and science. Required fields are marked *. How to calculate the formal charge on a carbon atom in CH2Cl2 Lewis Structure? Now we will find the least electronegative atom in the CH2Cl2 compound, after that, we will place it at the center of the lewis diagram and the rest atoms will be spread around it. The lewis structure of CH2Cl2 contains 4 single bonds in the form of two C-H bonds and two C-Cl bonds. The Carbon atom (C) is at the center and it is surrounded by two Hydrogen (H) and two Chlorine atoms (Cl). It has many uses, but majorly it is used in the food industry. This usually means the atom lower and/or to the right in the Periodic Table, N in this case. These four orbitals hybridize together to form four identical sp3 orbitals, all of which have the same energy. Just another site. When two or molecules participate in the bond formation, their orbitals overlap due to the sharing of electrons. In the very first step, we will count the total valence electron in the CH2Cl2 molecule. Cl. Connect outer atoms to the central atom with a single bond. As the shape of the molecule is tetrahedral and Carbon and Chlorine have a difference in their electronegativity. Put the least electronegative atom in the center. Place the valence electrons in the C-H and C-Cl bond pairs starting with the core carbon, two hydrogen, and two chlorine atoms in the CH2Cl2 molecule. Each electron pair (:) in the lewis dot structure of CH2Cl2 represents the single bond ( | ). With the core central carbon atom, the four terminal with two chlorine and two hydrogen atoms form covalent bonds, leaving the carbon atom with no lone pairs on it. As we have already place carbon and Hydrogen atoms, we just have to place a Chlorine atom in this structure. The tetrahedral molecular geometry and structure of the CH2Cl2 molecules are similar to that of the methane (CH4) molecule. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Calculation of valence electrons in CH2Cl2. Step 3: That's it Now your window will display the Final Output of your Input. explanation helped slightly. To know the lewis structure, it is vital to find the number of valence electrons in the compound. Here, we have a total of 10 electron pairs. Now we need to add lone pairs of electrons. with carbon atom. The overview provided in this article helps in establishing a basic understanding of the structure of CH2Cl2 through chemical bonding. Dichloromethane is directly produced by the chlorination of CH3Cl. In order to determine the formal charges on all the atoms in C2H 3Cl, or vinyl chloride, draw its Lewis . Usually, those remaining electron pairs should be started to mark on outside atoms. And to help you with understanding its structure in-depth, I will help you to make its Lewis structure step-by-step in this blog post. Because carbon and chlorine are members of the periodic tables carbon and halogen family groups, their valence electrons are four and seven, respectively. If there are remaining electrons they can be used to complete the octet of the central atom. of CH2Cl2 is shown below. Also, all the 20 valence electrons of CH2Cl2 molecule (as calculated in step #1) are used in the above structure. Therefore, this structure is the stable lewis structure of CH2Cl2. Also, individual atoms do not have charges. valence electrons given by hydrogen atom =, valence electrons given by chlorine atoms =. There are no charges on atoms in above structure. Tetrahedral. To understand the Lewis structure lets first calculate the total number of valence electrons for Dichloromethane. The steric number of the carbon central atom in the CH 2 Cl 2 molecule is 4, thus, it forms Sp 3 hybridization. Carbon is less electronegative than Chlorine, so it'll go on the inside, and Hydrogens always go on the outside. I am Savitri,a science enthusiast with a passion to answer all the questions of the universe. And when we divide this value by two, we get the value of total electron pairs. Study now. 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The hydrogen atom has only one valence electron. CH 2 Cl 2 (dichloromethane) has one carbon atom, two hydrogen atoms, and two chlorine atoms. Here in the CH2Cl2 molecule, if we compare the carbon atom (C) and chlorine atom (Cl), then the carbon is less electronegative than chlorine. As a result, it has the permanent dipole moment. Bonding electrons around chlorine(1 single bond) = 2. only has one electron in its last shell (valence shell).Carbon Whereas the ones that do not participate in forming any bonds are called lone pairs of electrons or non-bonding pairs of electrons. It has a difference in electronegativity values between carbon and chlorine atoms, with carbons pull being less than chlorines terminal in the CH2Cl2 molecule. CH2Cl2 Lewis structure is dot representation, Zero charge on the CH2Cl2 molecular structure, Polarity of the molecules are listed as follows, Lewis structure and molecular geometry of molecules are listed below, Pingback: How to draw BeCl2 Lewis Structure? The atomic number of carbon is 6; therefore, it possesses 6 electrons in its neutral form. The first step is to sketch the Lewis structure of the CH2Cl2 molecule, to add valence electron around the carbon atom; the second step is to add valence electrons to the two chlorine and two hydrogen atoms, and the final step is to combine the step1 and step2 to get the CH2Cl2 Lewis Structure. We shall start by calculating the number of valence electrons in each atom of CH2Cl2 in order to see how short an atom is from an octet (or duplet in the case of hydrogen). So place the Carbon atom in the center and draw four dots around it like this: Now that we have placed the Carbon atom, lets put other atoms. According to the above table, the geometry of CH2Cl2 is tetrahedral, corresponding to the conditions stated for AX4. Complete octets on outside atoms.5. According to the VSEPR theory, for a regular tetrahedral structure, the bonded atoms around the central atom will spread at an angle of approx 109.5 to minimize the repulsion and attains stability. Cl. Still, the dipole moment of the C-Cl bond will not cancel out because the C-H bonds are almost nonpolar(due to a small electronegativity difference), hence, the weak dipole of C-H bonds is unable to cancel out the strong dipole of C-Cl. This can help us determine the molecular geometry, how the molecule might react with other molecules, and some of the physical properties of the molecule (like boiling point and surface tension).Chemistry help at https://www.Breslyn.org In general you want: Why are there different ways for the "same" Lewis structure? In lewis structure of S 2 O 32- ion, there is -2 charge and oxygen atoms should hold them. So there are no remaining electron pairs. Im a mother of two crazy kids and a science lover with a passion for sharing the wonders of our universe. What is the shape of each molecule? Home How to draw CH2Cl2 Lewis Structure? According to the VSEPR theory, molecules having a structure similar to AX4, where a molecule has four negatively charged centers, will take a tetrahedral shape. has four electrons in its last shell. This structure helps understand the arrangement of valence electrons around the individual atoms along with the bonds they form. Now, we can study, how dichloromethane's lewis structure is drawn step by step in this tutorial. We have a total of 20 valence electrons for CH2Cl2. It results in some permanent dipole moment in the molecule which is 1.67 D. Therefore, we can say, the overall CH2Cl2 molecule is polar in nature. i. It depends what you want to show. B.E = Bond pair electron in C atom of CH2Cl2 molecule. Also, it has bond angles of 109.5, which corresponds to its molecular geometry. It is also used in food technology as a solvent. Cl. However those all steps are mentioned and explained in detail in this tutorial for your knowledge. It is a colorless and volatile liquid with a sweet smell. The lesser the formal charge on atoms, the better the stability of the lewis diagram. Drawing CH2Cl2 Lewis Structure is very easy to by using the following method. Lewis Structure. }] The polarity of any compound depends on the lone pairs of electrons and symmetry of the compound. In a CH2Cl2 molecule, the outer atom is hydrogen and chlorine. ), Periodic table labeled (14 different labeled images), Periodic table with electronegativity values, Protons neutrons and electrons of all elements. This theory states that a molecule takes a shape in which two negatively charged centers are as far from each other as possible ( both bonded and non-bonded pairs of electrons). (1 0 2/2) = 0 formal charge on hydrogen atoms. is a group IA element in the periodic table and We look at the electronic structure of atomic carbon, hydrogen, and chlorine. Totally, 12 valence electrons placed on the two chlorine atoms of the CH2Cl2 molecule. But no need to mark on hydrogen, because each hydrogen has already two electrons. The approx bond angle in CH2Cl2 is based on the type of bond, Cl-C-H = 108, H-C-H = 112, Cl-C-Cl = 112.2. An electron in an atoms outermost shell is known as a valence electron. Then place the valence electron in the chlorine atom, it placed around seven electrons(step-2). There are eight electrons being shared in the Lewis structure of CH2Cl2. Legal. Mark the lone pairs on the sketch as follows: Use the following formula to calculate the formal charges on atoms: Formal charge = valence electrons nonbonding electrons bonding electrons, For carbon atom, formal charge = 4 0 (8) = 0, For each hydrogen atom, formal charge = 1 0 (2) = 0, For each chlorine atom, formal charge = 7 6 (2) = 0. document.getElementById( "ak_js" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Also, since neutral "Ca" is on the second column/group, it . Hydrogen atoms already completed their octet since they are joined with one single bond means 2 electrons and remember, hydrogen only needs 2 electrons to have a full outer shell. Put two electrons between atoms to form a chemical bond. There are -2 charge on SO 42- ion. According to VSEPR theory, no electronic repulsion of the lone pair and bond pair leads the CH2Cl2 molecule to take on a tetrahedral molecular geometry shape. As a result, central carbon in the CH2Cl2 Lewis structure, with all two chlorine and two hydrogens arranged in the tetrahedral geometry. Lone pairs are those represented as dots in the lewis diagram that do not take part in the formation of bonds and are also called nonbonding electrons. Then the total outermost valence shell electrons can be calculated as follows, Total outermost valence shell electrons available for CH2Cl2 Lewis structure( dot structure) = 4 +2*7+ 2*1=20 valence electrons in CH2Cl2. The carbon core atom (four single bonds connected to two chlorine and two hydrogen atoms ) of the CH2Cl2 molecule has four valence electrons, no lone pair of electrons, and eight bonding electrons. { Hence, Chloromethane has a tetrahedral molecular geometry to avoid the repulsive forces and separating the bonded electrons. Save my name, email, and website in this browser for the next time I comment. Bond pairings of C-Cl and C-H are what theyre called. The electronegative value difference between carbon and chlorine, Electronegativity value of chlorine= 3.16, Difference of electronegativity value between carbon and chlorine= 3.16 2.55 =0.61, The electronegative value difference between carbon and hydrogen, Electronegativity value of hydrogen= 2.20, Difference of electronegativity value between carbon and hydrogen= 2.55 2.20 =0.35. Draw the Lewis dot structure of CH2N2. N-F C-F Cl-F F-F 2 Answers C-F is the most polar. My aim is to uncover unknown scientific facts and sharing my findings with everyone who has an interest in Science. It is miscible with many organic solvents. Dichloromethane (CH2Cl2) contains one carbon atom, two hydrogen atoms and two chlorine atoms. Place remaining electrons on outer atoms and complete their octet. Out of all these atoms, Carbon is the least electronegative one, and hence we will place it in the central position. Heres how you can draw the CH2Cl2 lewis structure step by step. Worth 0 participation points and 3 correctness points You are given the following 5 number summary for a sample 2,13,22,31, 50 What is the LEAST appropriate statement that can be made? So, out of the total of 20 valence electrons available for the CH2Cl2 Lewis structure, we used 8 for the CH2Cl2 molecules two C-Cl and C-H bonds. CH2Cl2, total pairs of electrons are ten in their valence shells. structure is a tetrahetron, but Not symmetrical, therefore it's 8 of the e-, the remaining 12 you will put around the two Cls (six Corresponding to sp3 hybridization, the geometry is tetrahedral when there are no lone pairs of electrons on the central atom. Calculate the total number of valence electrons in the CH2Cl2 molecules outermost valence shell. The CH2Cl2 molecules total dipole moment is predicted to be 1.6 D. It has a partial negative charge for chlorine atoms and a partial positive charge for the central carbon atom.