Abstract
AbstractThe complexes [Ti(η5‐C5H4R)2(NCSe)2] [R = Me (1), SiMe3 (2), or SiEt3 (3)] were prepared from the corresponding dichlorides with KSeCN in acetone; the oxygen‐bridged complex [Ti(η5‐C5H4Me)2(NCSe)]2O (4) was formed by air oxidation of (1). All complexes were characterized by elemental microanalysis and by IR, 1H NMR, and mass spectroscopies. An X‐ray analysis of (1) and (4) confirms the results of IR studies that these complexes contain N‐bonded selenocyanate ligands. In molecules (1) and (4) there is a pseudotetrahedral arrangement about each titanium. The NCSe chains are linear with normal NC and CSe bond distances. The dimer (4) contains an approximately linear TiOTi bridge (angle 173.4º) with a TiO bond distance of 1.838 Å. The structural results are compared with those in related compounds.
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