L27to36Bio_Key

L27to36Bio_Key - MIT OpenCourseWare http:/ocw.mit.edu 5.111...

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MIT OpenCourseWare http://ocw.mit.edu 5.111 Principles of Chemical Science Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms .
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5.111 Principles of Chemical Science Solutions to selected biology-related questions from problem sets for lectures 27-36 Transition Metals A . Cisplatinum [Pt(NH 3 ) 2 Cl 2 ] is a potent anticancer drug. (a) Draw the structure of this square planar molecule and the structure of its isomer transplatinum. ( b) What are the angles for a square planar molecule? (c) What is the CN? (d) Draw the crystal field energy-level diagram for cisplatinum, labeling the d-orbitals. (e) Predict whether cisplatinum is diamagnetic or paramagnetic? Explain your answer. a) Pt Cl NH 3 3 3 3 Cisplatinum Transplatinum b) 90 ° c) Cisplatinum has four ligands. CN (coordination number) = 4 d) Pt is in group 10. The d count for cisplatinum therefore is 10 – 2 = 8. d 8 (Square planar crystal field) d x 2 -y 2 d z 2 d xy d xz d yz e) Cisplatinum is diamagnetic. It has no unpaired electrons.
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This note was uploaded on 03/02/2012 for the course CHEM 5111 taught by Professor Vogel during the Fall '08 term at MIT.

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L27to36Bio_Key - MIT OpenCourseWare http:/ocw.mit.edu 5.111...

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