Study of Proton-Deuterium Exchange in Ten-Vertex Boron Hydrides

Autor:	Alexander V. Prikaznov, Igor B. Sivaev, Alexei A. Titov, Oleg A. Filippov, Vladimir I. Bregadze, Vikentii I. Bragin, Tatyana A. Teplinskaya, Pavel V. Petrovskii, Elena S. Shubina
Rok vydání:	2007
Předmět:	Crystallography Proton chemistry Hydrogen bond Inorganic chemistry Kinetic isotope effect Alkoxy group chemistry.chemical_element Boranes Hydrogen–deuterium exchange General Chemistry Nuclear magnetic resonance spectroscopy Boron
Zdroj:	Collection of Czechoslovak Chemical Communications. 72:1725-1739
ISSN:	1212-6950 0010-0765
DOI:	10.1135/cccc20071725
Popis:	The effect of electron-donating and electron-withdrawing substituents on the proton-deuterium exchange in derivatives of the closo-decaborate anion in methanol-d4 was studied. Introduction of the electron-donating hydroxy (alkoxy) group into the apical position of the boron cage strongly promotes the H-D exchange at the antipodal apical vertex, whereas introduction of the electron-withdrawing diazonium group stops the H-D exchange completely. The general order of the proton-deuterium exchange in equatorially-substituted derivatives [2-B10H9R]n- is 10 > 1 >> 7,8 > 4 > 3,5 ≈ 6,9. Formation of dihydrogen bonds between 1- and 2-hydroxy derivatives of the closo-decaborate anion and alcohols was investigated and their possible role in the H-D exchange was discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8f39e5eef08c99d0911d4e9f1779b70e https://doi.org/10.1135/cccc20071725 Zobrazit plný text záznamu