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EPR evidence for alpha-triphenylstannylvinyl radicals in the O-directed hydrostannation of dialkylacetylenes with Ph3SnH/cat. Et3B/O-2

Watson, HA, Fielding, AJ and Hale, KJ (2021) EPR evidence for alpha-triphenylstannylvinyl radicals in the O-directed hydrostannation of dialkylacetylenes with Ph3SnH/cat. Et3B/O-2. Chemical communications (Cambridge, England), 57 (60). pp. 7449-7452. ISSN 1364-548X

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Abstract

Here we provide definitive EPR evidence for the existence of α-triphenylstannylvinyl radicals in the low temperature O-directed free radical hydrostannation of dialkyl propargylic alcohols with Ph3SnH/cat. Et3B and O2in PhMe. Isotropic hyperfine splitting patterns and spectral simulations confirm the assignments made. In the case of the α-triphenylstannylvinyl radical(Z)-2, an isotopic119/117Sn hyperfine coupling constant of 9.5 mT (95 G) was measured along with a1Hβhyperfine coupling constant of 1.1 mT.

Item Type: Article
Uncontrolled Keywords: Science & Technology; Physical Sciences; Chemistry, Multidisciplinary; Chemistry; ALKYNE HYDROSTANNATION; HYDROSTANNYLATION; VINYL; DERIVATIVES; ACETYLENES; ALCOHOLS; Organic Chemistry; 03 Chemical Sciences
Subjects: R Medicine > RM Therapeutics. Pharmacology
Divisions: Pharmacy & Biomolecular Sciences
Publisher: The Royal Society of Chemistry
SWORD Depositor: A Symplectic
Date Deposited: 19 Oct 2022 10:02
Last Modified: 19 Oct 2022 10:15
DOI or ID number: 10.1039/d1cc01702k
URI: https://researchonline.ljmu.ac.uk/id/eprint/17886
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