Abstract
Equimolar mixtures of trisdiaminoethanenickel(II) and tris-(1,2- or 1,3-diaminopropane)nickel(II) perchlorate react with acetone to yield as the major products the nickel(II) complexes heptamethyltetra-azacyclotetradecadienenickel(II), F, and hexamethyltetra-azacyclopentadecadienenickel(II), C, respectively, formed by condensation of four acetone residues and one each of the diamine residues about the nickel ion. The diamagnetic perchlorates C(ClO4)2 and F(ClO4)2 and the paramagnetic thiocyanates C(NCS)2 and D(NCS)2, where D is hexamethyltetra-azacyclohexadecadienenickel(II), formed by reaction of tris-(1,3-diaminopropane)nickel(II) with acetone, are described. The variation in the resistance towards acid hydrolysis of these complexes with varying heterocyclic ring size is discussed [D is more rapidly hydrolysed than C, while F has the extreme resistance towards hydrolysis shown by hexamethyltetra-azacyclotetradecadienenickel(II), formed from trisdiaminoethanenickel(II) and acetone].
Published Version
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