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Zirconium Complexes of Two Different Iminopyrrolyl Ligands – Syntheses and Structures
Author(s) -
Kottalanka Ravi K.,
Naktode Kishor,
Panda Tarun K.
Publication year - 2014
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.201300367
Subject(s) - zirconium , denticity , chemistry , ligand (biochemistry) , steric effects , coordination sphere , moiety , crystallography , crystal structure , stereochemistry , metal , toluene , medicinal chemistry , inorganic chemistry , organic chemistry , biochemistry , receptor
The reaction involving N‐aryliminopyrrolyl ligand, 2‐(( p ‐Me‐C 6 H 3 N=CMe)–C 4 H 3 NH) ( 1a ) (Imp Me ‐H), and Zr(O t Bu) 4 in a 2:1 molar ratio in toluene at 90 °C afforded the corresponding bis(iminopyrrolyl) complex of zirconium, [(Imp Me ) 2 Zr(O t Bu) 2 ] ( 2a ) having two bidentate iminopyrrole groups in the coordination sphere. In contrast, the bulkier 2‐((2,6‐ i Pr 2 C 6 H 3 N=CH)–C 4 H 3 NH) ( 1b ) (Imp Dipp ‐H) and Zr(O t Bu) 4 in a 1:1 molar ratio under the same condition yielded the corresponding mono(iminopyrrolyl) complex of zirconium, [(Imp Dipp )Zr(O t Bu) 3 (THF)] ( 2b ), which contains only one bidentate iminopyrrole moiety in the coordination sphere. Both complexes were characterized by single‐crystal X‐ray diffraction analysis. The solid‐state structures reveal that the bulky iminopyrrole ligands cause a steric crowding around the zirconium ion along with three tert ‐butoxide ligands attached to the central metal atom.