Synthesis, spectroscopic studies and structure of gold(III) chloride compounds of heterocyclic N-oxi...

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" Synthesis, spectroscopic studies and structure of gold(III) chloride compounds of heterocyclic N-oxide diadducts revealing short hydrogen bond "
S. A. A. Al-Hamoud

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	1112372
Doc. No	:	TLpq230800278
Main Entry	:	S. A. A. Al-Hamoud
Title & Author	:	Synthesis, spectroscopic studies and structure of gold(III) chloride compounds of heterocyclic N-oxide diadducts revealing short hydrogen bond\ S. A. A. Al-Hamoud
College	:	King Fahd University of Petroleum and Minerals (Saudi Arabia)
Date	:	1985
student score	:	1985
Degree	:	M.S.
Page No	:	116
Abstract	:	The present study deals with the synthesis and structure elucidation of several novel gold(III) chloride compounds having general formula (H(R-usd\rm pyNO)\sb2\rbrack\lbrack AuCl\sb4\rbrackusd where R = 2-Me, 3-Me, 4-Me, 2,6-(CH3)\sb2, p-NO2 and m-COOH. The three-dimensional single crystal x-ray structure analysis was completed on three compounds, namely, (H(2-usd\rm picNO)\sb2\rbrack\lbrack AuCl\sb4\rbrack,usd (H(3-usd\rm picNO)\sb2\rbrack\lbrack AuCl\sb2\rbrackusd and (H(4-usd\rm picNO)\sb2\rbrack\lbrack AuCl\sb4\rbrack.usd In all compounds the short hydrogen bonded dimeric cation was stabilized by the (AuCl4\rbrack \sp- anion. The O-H-O bond in the diadducts is among the shortest so far reported in literature. The short hydrogen bond in the (H(2-usd\rm picNO)\sb2\rbrack\lbrack AuCl\sb4\rbrackusd is unique in that the bridged proton has no symmetry restrictions usually known to exist in similar hydronium ion diadducts. The presence of a strong and broad absorption band around 1050 cm in IR spectra has been established as a diagnostic observation for the existence of a short hydrogen bond with O ... O separation less than 2.5A. (Abstract shortened by UMI.)
Subject	:	Chemistry
	:	Pure sciences