Question

2. (4 marks) A molecule with molecular formula CH2N2 has a C-N-N bond angle of 180° and an H-C-H bond angle of 120°. Draw the Lewis structure of this compound that is consistent with these bond angles and also satisfies the octet rule. Show all lone pairs in this structure using the proper dots (*) and determine the formal charges on all atoms. Indicate the formal charges on atoms only if they are not zero. If more than one resonance structure is possible, draw only the most important one. Also, for both of the nitrogen atoms in the structure, which orbitals on each atom are used to form the sigma bond to the other nitrogen atom? (you do not need to draw the orbital itself).

Answer 1

CHaNa is diazomethane. Ha al 20 € 120 ANS Ho Tao 18001 - formou charge -1 forinal charge on N = +1 • Octet of carbon and both nitrogen is complete doublet of both hydrogen is complete. carbon is sp² hybridised with bond angle of 120°. central Nitrogen is sp hybridised with a and bond 'angle of 9200

Terminal nimegen has one negative charge and have two lone pains. orinal charge on both hydrogen and carbon is zeris. Resonating structures - Ha nem CN moco Sp2 sp hybridis alton 103 Sp hybridisation Ha o CONEN Ho ì A Bond angle - 180° Bond angle - less than 10928' o toh ac 20. } for central P22 (25) TOPY)-(PPY) Tlab), hem [°(882) – QB2)n]

TQP2) - (2 Pzin a ł(2P) -(2PX). 1 Tarz) - (85) Talv), _ (RP/) *