Recitation session five

Recitation session five - 6. Thiourea (NH 2 ) 2 CS Why cant...

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Recitation five Lewis structures, VSEPR rules and hybridization Do a Lewis calculation for these molecules/ ions, draw a Lewis structure, determine the formal charges, the oxidation numbers, the electron regions around the central atom(s), determine the bond angles, hybridizations and bond orders and sketch a 3D structure using solid and hashed wedges: 1. CH 3 CHO (acetaldehyde, ethanal) 2. BFCl 2 , (name?) 3. (CH 3 ) 3 NH + (trimethylammonium ion) 4. C 3 O 2 (linear) (carbon suboxide) 5. N 3 - , HN 3 and H 2 N 3 + (azide, hydazoic acid)
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Unformatted text preview: 6. Thiourea (NH 2 ) 2 CS Why cant you attach a hydrogen atom to the middle nitrogen of the hydrazoic acid, but only at the end? The actual N-N-N bond angle in hydrazoic acid is 171 degrees. Why do you think that is? Do you have any choice in the position of the protons of H 2 N 3 + ? Why is there a double C=S bond and not a N=C bond in thiourea? In carbon suboxide are the bonds covalent? Polar? Ionic? Is the octet rule obeyed in all the species?...
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