## Abstract From ^13^C‐7 labeled toluene the following ^13^C‐methyl __o__‐ and __p__‐substituted toluenes were synthesized: __o__‐NO~2~, ‐NH~2~, ‐I and CN; __p__‐NO~2~ and ‐NH~2~. Each of these labeled compounds was studied by carbon magnetic resonance to determine all carbon‐13carbon‐13 splittin
Preparation of carbon-13 C disulfide and carbon-13C oxysulfide
✍ Scribed by Vernon N. Kerr; Donald G. Ott
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- French
- Weight
- 140 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
Carbon‐^13^C disulfide was synthesized from methane‐^13^C with hydrogen sulfide in a heated quartz chamber. Carbon‐^13^C oxysulfide was made from carbon‐^13^C monoxide with elemental sulfur heated in the presence of sodium methylate.
📜 SIMILAR VOLUMES
## Abstract Carbon‐carbon coupling constants have been observed in [90% 3‐^13^C~1~]tryptophan and used to assign the ^13^C resonances of the indole ring. The results support a reassignment of C‐5 and C‐6 recently suggested on the basis of the reassigment of the corresponding resonances in indole. C
## Abstract All ^13^C—^13^C splittings involving the C‐4 carbon of 4‐propyl‐3‐heptene and the C‐1 carbon of 1‐methylcyclohexene were determined from the appropriately labeled (> 90%‐^13^C) derivatives. The observed trends in coupling constants continue to offer additional means of carbon chemical s
## Abstract According to reported results by Kato __et al.__ in their 1977 paper, ^13^C data can not be used for assignment of stereochemistry at carbon‐13 in pimaradiene‐type compounds. By comparing well established ^13^C trends to the appropriate conformations, one can indeed predict the correct