RING FLATTENING IN THIANTHRENE SULFONIUM BIS(CARBOMETHOXY)METHYLIDES

Autor:	A. L. Ternay, Bobbie E. South, R. Mckellar, W. W. Lam
Rok vydání:	1992
Předmět:	chemistry.chemical_classification Sulfonium Organic Chemistry Nuclear magnetic resonance spectroscopy Ring (chemistry) Biochemistry Medicinal chemistry Inorganic Chemistry chemistry.chemical_compound chemistry Ylide Molecule Thianthrene Carbanion
Zdroj:	Phosphorus, Sulfur, and Silicon and the Related Elements. 73:63-66
ISSN:	1563-5325 1042-6507
DOI:	10.1080/10426509208034432
Popis:	Bis(carbomethoxy)methylides derived from thianthrene 5,5-dioxide and 2,7-dichlorothianthrene 5,5-dioxide exhibit hindered S+ —C− bond rotation. Variable temperature NMR studies are described for these ylides as well as 9,9-dimethylthioxanthenium bis(carbomethoxy)methylide. With coalescence temperatures of ≍30°C (200 MHz), all have δG‡ ≍ 15 kcal/mol.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3e4360b8556a0e077098c651ec1441b2 https://doi.org/10.1080/10426509208034432 Zobrazit plný text záznamu