The two square-planar isomers of [PtBrCl(PR3)2] (where PR3 is a trialkylphosphene) have different 31P-NMR spectra as shown below. For this exercise, we ignore the coupling to 195Pt (I=1/2 at 33% abundance). One isomer (A) shows a single 31P resonance; the other (B) shows two 31P resonances, each of which is split into a doublet by the second 31P nucleus. Which isomer is cis and which is trans? Draw the structures of the two isomers.

The two square-planar isomers of [PtBrCl(PR3)2] (where PR3 is a trialkylphosphene) have different 31P-NMR spectra as shown below. For this exercise, we ignore the coupling to 195Pt (I=1/2 at 33% abundance). One isomer (A) shows a single 31P resonance; the other (B) shows two 31P resonances, each of which is split into a doublet by the second 31P nucleus. Which isomer is cis and which is trans? Draw the structures of the two isomers.

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter12: Structure Determination: Mass Spectrometry And Infrared Spectroscopy

Section12.SE: Something Extra

Problem 50AP

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