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The Di(benzothiazol‐2‐yl)‐phosphanide Janus Head Ligand in Zinc and Cadmium Coordination
Author(s) -
Stey Thomas,
Stalke Dietmar
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200500293
Subject(s) - chemistry , ligand (biochemistry) , deprotonation , zinc , metalation , ring (chemistry) , cadmium , metal , chelation , sulfur , crystallography , medicinal chemistry , stereochemistry , inorganic chemistry , ion , organic chemistry , biochemistry , receptor
The metal phosphanide complexes [(Me 3 Si) 2 NZn(BTH) 2 P] 2 , ( 1 ), and [(Me 3 Si) 2 NCd(BTH) 2 P] 2 , ( 2 ), (BTH = benzothiazolyl, C 7 H 4 NS) were synthesized via metalation of the di(benzothiazol‐2‐yl)‐phosphane employing the metal bis(bis(trimethylsilyl)amides) and structurally characterized. Apart from the deprotonated central phosphorus atom both benzothiazolyl substituents in the anionic Janus head ligand contain a sulfur and a nitrogen ring atom as potential donor sites. As the π‐electron density is mainly located at both nitrogen atoms, zinc and cadmium ions are chelated by the two ring nitrogen atoms. In the head‐to‐tail dimers additional metal‐phosphorus bonds are formed. The sulfur atom is not involved in the coordination in either complex. Although the Cd 2+ ion is remarkably bigger than the Zn 2+ ion the ligand can respond by a slightly more pronounced butterfly arrangement.