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Aminotroponiminate and a Related Diimine as Ligands for Tungsten Complexes
Author(s) -
Kirin Vladimir,
Roesky Peter W.
Publication year - 2004
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.200300369
Subject(s) - diglyme , diimine , ligand (biochemistry) , chemistry , isopropyl , tungsten , yield (engineering) , medicinal chemistry , crystallography , stereochemistry , materials science , catalysis , organic chemistry , solvent , biochemistry , receptor , metallurgy
Abstract Reaction of N ‐isopropyl‐2‐(isopropylamino)troponimine, {( i ‐Pr) 2 ATI}H, with fac ‐[W(CO) 3 (NCMe) 3 ] yield the complex tungsten‐tetracarbonyl‐ N, N '‐diisopropyl‐1, 2‐diimino‐3, 5‐cycloheptadiene ( 1 ), in which the ligand is tautomerized from the enamino to the imino isomer. As a result of the rearrangement the conjugate 10 π electron system of the ligand is destroyed. Further, treatment of compound 1 with an excess of KH in THF leads to the ionic complex [K(THF) 2 ][{( i ‐Pr) 2 ATI}W(CO) 4 ] ( 2 ). In the presence of diglyme the corresponding complex [K(diglyme) 2 ][{( i ‐Pr) 2 ATI}W(CO) 4 ] ( 3 ) is obtained. All compounds have been characterized by spectroscopic methods. Complex 1 has also been investigated by single crystal X‐ray diffraction.