TY - JOUR
T1 - Schiff base chemistry of the {ReO}3+ core
T2 - Structural characterization of the unusual '3 + 2' complex [ReO(η3-OC6H4-CH=NC6H4-2-S)(η2-OC6H4C=NC6H4-2-S)]
AU - Chen, Xiaoyuan
AU - Femia, Frank J.
AU - Babich, John W.
AU - Zubieta, Jon
N1 - Funding Information:
This work was supported by a grant from the Department of Energy, Office of Health and Environmental Research (D2-FG02-99ER62791).
PY - 2000/9/11
Y1 - 2000/9/11
N2 - The reaction of [ReOCl3(PPh3)2] with salicylaldehyde-2-mercaptoanil (1) in methanol yields [ReO(OCH3)(PPh3)(η3-OC6H4CH=NC6H4S)] (3). Reaction of 3 with 2-(2-hydroxyphenyl)benzothiazole (2) produces [ReO(η3-OC6H4CH=NC6H4S)(η2-OC6H4C=NC6H4S)] (4) in good yield. Compound 4 may also be prepared directly from the reaction of [ReOCl3(PPh3)2] with excess 1, after prolonged reaction times in the presence of atmospheric oxygen. The structure of 3 exhibits a distorted octahedral Re(V) center coordinated to a terminal oxo-group, a methoxy ligand, a triphenylphosphine ligand, and the N, O and S donors of the tridentate Schiff base ligand. The octahedral geometry of 4 is defined by the terminal oxo-group, the N, O and S donors of the tridentate Schiff base ligand, and the N and O donors of the bidentate 2-(2-hydroxophenyl)benzothiazole ligand. Oxidation and cyclization of the Schiff base salicylaldehyde-2-mercaptoanil to produce 2-(2-hydroxyphenyl)benzothiazole is precedented and in this instance may be driven by the formation of the robust '3 + 2' complex 4. (C) 2000 Elsevier Science S.A.
AB - The reaction of [ReOCl3(PPh3)2] with salicylaldehyde-2-mercaptoanil (1) in methanol yields [ReO(OCH3)(PPh3)(η3-OC6H4CH=NC6H4S)] (3). Reaction of 3 with 2-(2-hydroxyphenyl)benzothiazole (2) produces [ReO(η3-OC6H4CH=NC6H4S)(η2-OC6H4C=NC6H4S)] (4) in good yield. Compound 4 may also be prepared directly from the reaction of [ReOCl3(PPh3)2] with excess 1, after prolonged reaction times in the presence of atmospheric oxygen. The structure of 3 exhibits a distorted octahedral Re(V) center coordinated to a terminal oxo-group, a methoxy ligand, a triphenylphosphine ligand, and the N, O and S donors of the tridentate Schiff base ligand. The octahedral geometry of 4 is defined by the terminal oxo-group, the N, O and S donors of the tridentate Schiff base ligand, and the N and O donors of the bidentate 2-(2-hydroxophenyl)benzothiazole ligand. Oxidation and cyclization of the Schiff base salicylaldehyde-2-mercaptoanil to produce 2-(2-hydroxyphenyl)benzothiazole is precedented and in this instance may be driven by the formation of the robust '3 + 2' complex 4. (C) 2000 Elsevier Science S.A.
KW - Crystal structures
KW - Oxorhenium complexes
KW - Schiff base complexes
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U2 - 10.1016/S0020-1693(00)00191-2
DO - 10.1016/S0020-1693(00)00191-2
M3 - Article
AN - SCOPUS:0034637859
SN - 0020-1693
VL - 307
SP - 149
EP - 153
JO - Inorganica Chimica Acta
JF - Inorganica Chimica Acta
IS - 1-2
ER -