1. Coordination variety of phenyltetrazolato and dimethylamido ligands in dimeric Ti, Zr, and Ta complexes.
- Author
-
Bikzhanova GA and Guzei IA
- Abstract
Three structurally diverse 5-phenyltetrazolato (Tz) Ti, Zr, and Ta complexes, namely, (C
2 H8 N)[Ti2 (C7 H5 N4 )5 (C2 H6 N)4 ]·1.45C6 H6 or (Me2 NH2 )[Ti2 (NMe2 )4 (2,3-μ-Tz)3 (2-η1 -Tz)2 ]·1.45C6 H6 , (1·1.45C6 H6 ), [Zr2 (C7 H5 N4 )6 (C2 H6 N)2 (C2 H7 N)2 ]·1.12C6 H6 ·0.382CH2 Cl2 or [Zr2 (Me2 NH)2 (NMe2 )2 (2,3-μ-Tz)3 (2-η1 -Tz)2 (1,2-η2 -Tz)]·1.12C6 H6 ·0.38CH2 Cl2 (2·1.12C6 H6 ·0.38CH2 Cl2 ), and (C2 H8 N)2 [Ta2 (C7 H5 N4 )8 (C2 H6 N)2 O]·0.25C7 H8 or (Me2 NH2 )2 [Ta2 (NMe2 )2 (2,3-μ-Tz)2 (2-η1 -Tz)6 O]·0.25C7 H8 (3·0.25C7 H8 ), where TzH is 5-phenyl-1H-tetrazole, have been synthesized and structurally characterized. All three complexes are dinuclear; the Ti center in 1 is six-coordinate, whereas the Zr and Ta atoms in 2 and 3 are seven-coordinate. The coordination environments of the Ti centers in 1 are similar, and so are the ligations of the Ta centers in 3. In contrast, the two Zr centers in 2 bear a different number of ligands, one of which is a bidentate η2 -5-phenyltetrazolato ligand that has not been observed previously for d-block elements. The dimethylamido ligand, present in the starting materials, remained unchanged, or was converted to dimethylamine and dimethylammonium during the synthesis. Dimethylamine coordinates as a neutral ligand, whereas dimethylammonium is retained as a hydrogen-bonded entity bridging Tz ligands., (open access.)- Published
- 2024
- Full Text
- View/download PDF