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Titanium(III) Compounds with η 2 ‐Pyrazolato Ligands
Author(s) -
MöschZanetti Nadia C.,
Krätzner Ralph,
Lehmann Christopher,
Schneider Thomas R.,
Usón Isabel
Publication year - 2000
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/(sici)1099-0682(200001)2000:1<13::aid-ejic13>3.0.co;2-n
Subject(s) - chemistry , tetrahydrofuran , toluene , hexane , yield (engineering) , crystallization , titanium , potassium , medicinal chemistry , inorganic chemistry , nuclear chemistry , organic chemistry , solvent , metallurgy , materials science
The reduction of [L 2 TiCl 2 ] ( 1 ) (L = 3,5‐ tert ‐butylpyrazolate) with 1% Na/Hg in tetrahydrofuran (THF) affords the complex [L 2 TiCl(THF) 2 ] ( 2 ), which crystallizes from hexane in moderate yield. The analogous reduction carried out in toluene gives dimeric [(L 2 TiCl) 2 ] ( 3 ) in high yield. If the reduction time is extended to 3 days, the complex [L 3 Ti] ( 4 ) is isolated as light blue crystals in low yield. An alternative procedure for preparing compound 4 requires mixing [TiCl 3 (THF) 3 ] with 3 equivalents of potassium 3,5‐ tert ‐butylpyrazolate in toluene. Crystallization from hexane affords 4 in high yield. Crystallographic data for 2 , 3 and 4 are presented.