NDLI: Structural and spectroscopic studies of some adducts of silver( I) halides with thiourea and N-ethyl substituted thioureas

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	White, Allan H. Bowmaker, Graham A. Pakawatchai, Chaveng Saithong, Saowanit Skelton, Brian W.
Description	Author Affiliation: Bowmaker GA ( Department of Chemistry, University of Auckland, Private Bag 92019, Auckland, New Zealand. ga.bowmaker@auckland.ac.nz)
Abstract	Syntheses, single crystal X-ray structural and spectroscopic characterizations are described for a variety of adducts of silver halides with thiourea (‘tu’), N-ethylthiourea (‘ettu’ = $EtNH·CS·NH_{2})$ and N, N′-diethylthiourea (‘detu’ = EtNH·CS·EtNH ). This study greatly extends our knowledge of the complex chemistry of silver( I) halides with tu. The unexpected diversity of composition of such complexes was initially revealed by the powerful mechanochemical/ IR method and the structures of several of the new complexes were determined by X-ray crystallographic studies of samples subsequently prepared from aqueous solution. Structural characterizations provide extensive geometrical data for (mononuclear 1:3) [ XAg(xtu) $_{3}$ ] arrays (xtu = ettu, detu; X = Cl , Br , I), assisting vibrational spectroscopic assignments. With the parent tu ligand, binuclear ionic forms are obtained: $[tu_{2}Ag(μ-tu)_{2}Agtu_{2}]X_{2},$ the chloride as the dihydrate and the bromide as a di(thiourea) dihydrate adduct. With tu 1:2 complexes are defined for X = Cl , Br , as isomorphous one-dimensional polymers ; AgCl :tu (1:1) is a two-dimensional net with six-membered $Ag_{3}S_{3}$ rings and terminal chloride . Intermediate stoichiometries are defined in AgBr :tu (2:3), a one-dimensional polymer of $Ag_{2}S_{2}$ rhombs linked at the silver atoms, while $[Cl_{2}Ag_{3}(tu)_{4}](NO_{3})·H_{2}O$ is also a one-dimensional polymer in which chloride and thiourea sulfur atoms link six-membered $Ag_{3}S_{3}$ rings. Diagnostic bands in the IR and far-IR spectra of all of the synthesized complexes are assigned and interpreted in relation to the structures.
ISSN	14779226
Issue Number	18
Volume Number	39
e-ISSN	13645447
Journal	Dalton Trans.
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2010-05-14
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Silver Chemistry Thiourea Analogs & Derivatives Crystallography, X-Ray Ligands Molecular Conformation Spectrophotometry, Infrared Journal Article
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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