QuestionsFinalAns - O C C C π O C C C π LUMO O C C C π b HOMO O C C C π b III.1 d x2-y2 d yz d xy d z2 d xz Order of energy d x2-y2 = d xy< d

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Chemistry 007, Fall 2007 Cornell University Dr. Pontrello Selected Final Exam Review Answers I.1 C 27 H 30 O 6 Cl 2 I.2 5.402x10 -8 m I.3 n=4; l=1; m l =-1, 0, +1; m s =-1/2, +1/2 Total nodes = n-1 = 4-1 = 1 Radial nodes = n-l-1 = 4-1-1 = 2 Radial Probability Distribution radius 0 0 nodes x y radial nodes angular node II.1 BrF 3 <90 o , trigonal bipyramidal, T-shaped, sp 3 d XeF 2 180 o , trigonal bipyramidal, linear, sp 3 d CCl 4 109.5 o , tetrahedral, sp 3 ClF 4 - 90 o , octahedral, square planar, sp 3 d 2 II.2 N O H H N O H H etc. upper left C: 109.5 o , tetrahedral, sp 3 ; lower left C: 120 o , trigonal planar, sp 2 ; N: <109.5 o , trigonal pyramidal, sp 3 II.3 order of energy: σ 2s b < σ 2s * < π 2p b < σ 2p b < π 2p * < σ 2p * σ 2p b HOMO; π 2p * LUMO; diamagnetic; v = 1.484x10 6 m/s; σ 2s * = -18.55 eV
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2 II.4 all C are 120 o , trigonal planar, sp 2
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Unformatted text preview: O C C C π * O C C C π * LUMO O C C C π b HOMO O C C C π b III.1 d x2-y2 , d yz , d xy , d z2 , d xz ; Order of energy: d x2-y2 = d xy < d yz = d xz < d z2 III.2 Co 7+ , Cl-, Br-, I-; Structure A and B are diastereomers; Structure A does not have an enantiomer III.3 KCl, ion/ion, strongest; CH 3 CO 2 H, dipole/dipole (H-bond); CH 3 CH 2 OCH 2 CH 3 , dipole/dipole, weakest DNA strand N N N N N H H N N O O H DNA strand DNA strand N N N N O N N N O DNA strand H N H H H H ! + !-!-!-!-! + ! + !-!-!-!-!-!-! + ! + III.4 1.179 mol N 2 O (limiting reagent); 25.6 g NaN 3 III.5 CaO 3 Ti III.6 λ =6.0 Å; vertical displacement 338 mm...
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This note was uploaded on 02/28/2008 for the course CHEM 2070 taught by Professor Chirik,p during the Fall '05 term at Cornell University (Engineering School).

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QuestionsFinalAns - O C C C π O C C C π LUMO O C C C π b HOMO O C C C π b III.1 d x2-y2 d yz d xy d z2 d xz Order of energy d x2-y2 = d xy< d

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