ISSN:
0030-4921
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Temperature dependent proton magnetic resonance spectra of dichloro- and dimethyltin(IV) bis(N,N-di-isopropyl-dithiocarbamate) (1 and 2, respectively), dimethylchlorotin(IV) N,N-di-isopropyldithiocarbamate (3), dimethyltin(IV) bis(N-isopropyldithiocarbamate) (4), S-methyl-N,N-di-isopropyldithiocarbamate (5) and S-methyl-N-isopropyldithiocarbamate (6) were measured in halogenated hydrocarbons or CS2. The internal rotation around the isopropyl-nitrogen bond of 1, 2, 3 and 5 is restricted below -30°C, and that of 4 and 6 below -70°C; 1, 2 and 3 exist as only one conformer in dichloromethane, while 5 exists as two rotational isomers with respect to the isopropyl-nitrogen bond with a mole ratio of about 2·7:1·0 in CS2 below -30°C. At this temperature, 6 exists as two stereoisomers in CS2 with a mole ratio of about 1·2:1·0, although there is no stereoisomer in 4. From these results, possible conformations of the compounds at low temperature are proposed and the assignments of each proton signal are described.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1270060308
