Premium
Isomerism in Hexacoordinate Ti(IV) and Zr(IV) Complexes with a Tetradentate ONNO‐ Schiff Base Ligand
Author(s) -
Rezaei Kheirkhah Bahareh,
AlShboul Tareq M. A.,
Pröhl Felix Edwin,
Krieck Sven,
Görls Helmar,
Westerhausen Matthias
Publication year - 2022
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/ejic.202200528
Subject(s) - chemistry , hexacoordinate , ligand (biochemistry) , schiff base , medicinal chemistry , metalation , crystal structure , biphenyl , stereochemistry , crystallography , organic chemistry , receptor , silicon , biochemistry
The reactions of [(thf) 2 TiCl 4 ] with sodiated 2,2’‐bis[2‐hydroxy‐3,5‐di( tert ‐butyl)benzylideneamino]‐1,1’‐biphenyl ( 1 a ) and 2,2’‐bis[2‐hydroxy‐3,5‐di( tert ‐butyl)benzylideneamino]‐4,4’‐dimethyl‐1,1’‐biphenyl ( 1 b ) yield the corresponding Ti complexes 2 a and 2 b . Similarly, 1 a reacts with [(thf) 2 ZrCl 4 ] to the corresponding Zr derivative 3 . For 2 a , a mixture of cis‐β and trans isomers were observed in solution whereas the Zr congener exclusively forms the cis‐α form. Quantum chemical calculations verify that these isomers are the preferred molecular structures. The crystal structures of cis‐β isomeric 2 a and cis‐α isomeric 3 have been determined. Metalation of 1 a with Ti(NMe 2 ) 4 yields 2,2’‐bis[(2‐oxido‐3,5‐di(tert‐butyl)phenyl)‐dimethylaminomethylamino]‐1,1’‐biphenyl titanium(IV) ( 4 ) with a hexadentate ligand.