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Homochiral Self Recognition in Gold‐Phosphane‐Helicates
Author(s) -
Schuh Walter,
Kopacka Holger,
Wurst Klaus,
Peringer Paul
Publication year - 2002
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200208)2002:8<2202::aid-ejic2202>3.0.co;2-g
Subject(s) - chemistry , crystallography , helix (gastropod) , stereochemistry , single crystal , x ray crystallography , chirality (physics) , diffraction , optics , ecology , physics , chiral symmetry breaking , quantum mechanics , snail , nambu–jona lasinio model , biology , quark
Treatment of Au(SMe 2 )Cl with a mixture of ( R *,S*)‐ and ( R *,R*)‐(±)‐p4 (p4 = 1,1,4,7,10,10‐hexaphenyl‐1,4,7,10‐tetraphosphadecane) and TlOTf produces [Au 4 ( R , S ‐p4) 2 ](OTf) 4 ( 1 ) and a racemic compound of [Au 4 ( R , R ‐p4) 2 ](OTf) 4 and [Au 4 ( S , S ‐p4) 2 ](OTf) 4 ( 2 ). Compounds 1 and 2 were isolated as colorless crystals and characterized by single crystal X‐ray diffraction. In both 1 and 2 , four gold atoms are bridged by two p4 ligands. The structure of 1 is a meso ‐helicate composed of a P, an M and a central achiral domain. The ligands exhibit a head‐to‐head arrangement. The structures of 2 consist of a non‐palindromic double helix. In both 1 and 2 the R centers induce a left‐handed (M) and the S centers a right‐handed (P) helicity. The helical elements of both 1 and 2 are unsaturated and show Au ··· Au interactions. (© Wiley‐VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)