Question

De Senevi Samar CHEM DEPT O SCIENCE CHEMISTRY) LINCOLN UNIVERSITY PROBLEM SET COMEWORK) Structure and Bonding Chapter 1) You must show your work on all questions to recen t (10 points) Give the ground-state electron configuration for turime si nu 2. (15 points) Consider the structure of re, shown below, to answer the following questions HN-C-NI (a). Fill in any non-bonding valence electrons that are missing from the line-bond structure (b). What is the hybridization of carbon atom in urea O. What would be the predicted NH, 0-0 bond angle in urea 3. (20 points) The molecular formula CH.O can be converted into three-line hond (Kekulé) structures that are consistent with valence rules a. HCH . C= C H -C-C-Hd C- C=0 Η O-H HH Η a. Which one of the Kekule structures is not conscient with valence rules? Explain why the structure you chose in part a is not consistent with valence rules b 4. (10 points) Convert the following structure to a skeletal drawing and give its molecular formula H 1 H HC-C нін 3 hromo-1-cyclopentine 5. (15 points) Draw an orbital picture for acetylene, CH. Clearly label cach bond type and indicate the type of orbitals involved in each bond.

Answer 1

1s 252 2Ps Ground State E.C. aF 2) a) the rogens will have HN-C-N2 lone pair on will have tcoo pauTs b) Canbon is sp bridised C)N-C-O bond angle wa 120 Corbon is sp ybridiged beeause the 3) a) option d Pentavalemt carban not-possible , kormula " n not consisteut with valemee ules. b) The Canbon is bonded widh ive bones Means, it has 10 valence eleatTons leading gy to niolale ue octate ule C5 HBY 7

Tep P Osp-sp н OS-sp Tep-P Os-sp == HI 11 11 11 11 11 11