Question

5. (5 pts) Consider the hybridization and bonding scheme for cis-1,2-dichloroethene, CH2Cl2, using valence bond theory. (a) Complete the Lewis structure using the skeletal structure shown below: H H c-c CI CI (b) Use VSEPR theory to predict the electron domain geometry and the hybridization around carbon; (c) Draw an energy diagram showing the formation of hybrid orbitals from the atomic orbitals; (d) Sketch the molecule showing the orbitals and any overlapping orbitals to indicate covalent bonds; (e) Label all the bonds using sigma or pi notation followed by the type of overlapping orbitals; and (f) Write the total number of sigma and pi bonds in the provided box. Total number of sigma bonds Total number of pi bonds

Answer 1

lewis dot structure of Cathy Cl2 n = Total number of valence elections of Catach 4x2 + 2x1 + 2x2 = 0+2+14 = 24 number alors regnied to complete the octel = 2x no of hatrooms tox no of other atoms 2x2 + 8x 4 a 4+32 = 36 ng a number of electrons tal taking part in bonding 36-24 =12 humber 아 bruds & 쓸 number h, na of love pain 24-12 =6 : Lewis dot stonelure here canton is the least electio Hence it untral atom. H:C::C:H Love pari :C1: :21: • bonding electrons vé is the who negative atom. - = - H 1 ce ce H H e u us-1-2-dichloroe there hybrichisation sterie number of each carbon = Number of o boid & Number of love 3 to = 3 sp2 hybridised i pali Here each carlow atom H KIIL C 3 Spa sp²

electronie to of Carbon in excited state basakon с 1 V 1 1 1 1 2p) 125 Pure porbital sp² hybridised this artrital each carbon atom, there لمه 3 sp² ow 4 arbitals are Each C-H bond orbital C-c band hybridised orbitals & one pune parbital. All the half filled. is formed by the overlapping of sp² hybrid orbitals of carbon atom & s of Hatom. formed by the overlepping of sp² hybrid abrid orbitals A C-C is formed by the overlapping of pure parbitals of each carton. (d) cool bond is formed by overlapping of sph hybrid brid arbitals 어 orbitals of each canbow asorn bond side wise carbon atoos & orbital clatom. Н Н IS 30 C 3P Cl Number of or bond = 5 Number of a bond = 1