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Cobalt(II) Tri‐ tert ‐butoxysilanethiolates with Bidentate Spacer Ligands
Author(s) -
Pladzyk Agnieszka,
Baranowska Katarzyna
Publication year - 2009
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.200900093
Subject(s) - pyrazine , quinoxaline , denticity , cobalt , crystallography , chemistry , metal , crystal structure , dihedral angle , stereochemistry , molecule , inorganic chemistry , organic chemistry , hydrogen bond
A new series of Co II tri‐ tert ‐butoxysilanethiolate complexes with bidentate N , N′ ‐ligands (L) such as pyrazine, quinoxaline and 4,4′‐bipy was obtained: for pyrazine and quinoxaline the complexes are binuclear {[Co{SSi( t BuO) 3 } 2 ] 2 (μ‐L)} with metal atoms linked by an adequate heterocyclic base L. The use of 4,4′‐bipy resulted in a coordination polymer [Co{μ‐SSi( t BuO) 3 }{SSi( t BuO) 3 }(μ‐4,4′‐bipy)] n and two polymorphic forms of {[Co{SSi( t BuO) 3 } 2 ] 2 (μ‐4,4′‐bipy)}. Pyridyl rings in one polymorph form a torsion angle of 0.57°, whereas a rotation about the linking C–C bond of 4,4′‐bipy in second polymorph is significant and results in a torsion angle of 72.4°. Complexes were analysed and characterised using elemental analysis, solid state IR and UV/Vis spectroscopy, and single‐crystal X‐ray analysis.