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Tricarbonyl Complexes of Rhenium(I) with Acetylpyridine Benzoylhydrazone and Related Ligands
Author(s) -
Grewe Jacqueline,
Hagenbach Adelheid,
Stromburg Brigitte,
Alberto Roger,
VazquezLopez Ezequiel,
Abram Ulrich
Publication year - 2003
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.200390048
Subject(s) - rhenium , chemistry , deprotonation , protonation , ketone , amine gas treating , pyridine , ligand (biochemistry) , stereochemistry , medicinal chemistry , crystal structure , crystallography , organic chemistry , ion , biochemistry , receptor
Abstract Novel rhenium(I) tricarbonyl complexes have been prepared by reactions of (Et 4 N) 2 [Re(CO) 3 Br 3 ] with acetylpyridine benzoylhydrazone, Hapbhyd, di(2‐pyridyl)ketone benzoylhydrazone, Hpy 2 bhyd, bis(2‐pyridine)ketone, py 2 CO, and pyridinealdehyde terephtalaldehydebishydrazone, pytehyd. The ligands remain protonated when no supporting base is added and the following complexes have been isolated: [Re(CO) 3 Br(Hapbhyd)], [Re(CO) 3 Br(Hpy 2 bhyd‐py, hyd)], [Re(CO) 3 Br(Hpy 2 bhyd‐py 1 , py 2 )], [Re(CO) 3 Br(py 2 CO‐N, N)] and [Re(CO) 3 Br(pytehyd)]. Addition of triethyl amine results in deprotonation of Hapbhyd and the formation of [Re(CO) 3 (OH 2 )(apbhyd)], whereas Hpy 2 bhyd is hydrolysed and a rhenium complex with the monoanionic bis(2‐pyridyl)hydroxymethanolato ligand, {py 2 C(OH)O} ‐ , is formed. The same compound, [Re(CO) 3 {py 2 C(OH)O}], is obtained when triethyl amine and water are added to a mixture of (Et 4 N) 2 [Re(CO) 3 Br 3 ] and py 2 CO. The air‐stable products have been studied by spectroscopic methods and X‐ray crystallography.