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Structural and Spectral Study of Nickel(II) Complexes of Pyridyl bis {3‐piperidyl‐, bis {hexamethyleneiminyl‐, bis {N(4)‐diethyl‐, and bis {N(4)‐dipropylthiosemicarbazones}
Author(s) -
Gil Maria,
Bermejo Elena,
Castiñeiras Alfonso,
Beraldo Heloisa,
West Douglas X.
Publication year - 2000
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 - 10.1002/1521-3749(200011)626:11<2353::aid-zaac2353>3.0.co;2-h
Subject(s) - semicarbazone , chemistry , imine , pyridine , nickel , intramolecular force , stereochemistry , hydrogen bond , crystal structure , medicinal chemistry , molecule , polymer chemistry , crystallography , organic chemistry , catalysis
Pyridyl bis (N(4)‐substituted thiosemicarbazones), in which the substituents replacing the NH 2 group on the thiosemicarbazone moieties are piperidyl, H 2 Plpip; hexamethyleneiminyl, H 2 Plhexim; diethylamino, H 2 Pl4DE; and dipropylamino, H 2 Pl4DP, have been synthesized. These bis (thiosemicarbazones) and their nickel(II) complexes have been characterized with IR, electronic, mass, and 1 H and 13 C NMR spectra. Crystal structures have been solved for H 2 Plpip and all four nickel(II) complexes. H 2 Plpip does not possess hydrogen bonding between the thiosemicarbazone moieties, but is in the Z isomeric form with intramolecular hydrogen bonding from both thiosemicarbazone moieties to pyridine nitrogen atoms. The nickel(II) complexes possess square‐planar N 2 S 2 (i. e., imine nitrogen and thiolato sulfur atoms) centers and the two pyridine ring nitrogen atoms are not coordinated.