Abstract

C. Mercy Raj¹ and C.P. Prabhakaran²

Donor behaviour of five chelating ligands viz. 4-amino-1,2-dihydro-1,5-dimethyl-2phenyl(-3H-pyrazol-3-one (AAPy), 4-{2,-hydroxybenzalimino) -1, 2-dihydro-1,5-dimethyl-2 phenyl-3H pyarazol-3-one (AAPy SALH), 4-(2hydroxy naphthalimino)-1,2-dihydro-1,5-dimethyl-2-phenyl-3H pyrazol-3-one(AAPy NALH), glyoxalbis [N-(1,2-dihdro-1,5-dimethyl-2 phenyl-3H-pyrazol*3-one-4-yl)]imlne (AAPy GAL) and 1,2- dihdro-1,-5 dimethyl-2 pheny-4 (2'hydroxy naphthylazo) -3H-pyrazole-3-one (NAAPH) towards Ni (II) having thiocyanate and selenocyanate as counter anions was studied. The solid complex isolated are of the type Ni (AAPy)2 (NCSe)2. Ni (AAPy GAL) (NCS)² ,NiL (NCSe)2 (L * AAPy GAL or AAPy NALH), Ni (AAPy SALH) (NCX)CI (X = S or Se) NiL(NCS) (L= NAAP or AAPy NAL) and Ni(NAAP) (NCSe). They were characterised by elemental analyses, conductance and magnetic measurements and IR and electronic spectral studies. Indexing the X-ray powder pattern and TG analysis of Ni (AAPy)2 (NCSe)2 were also carried out.

Hydroxy; naphthalimino; thiocyanate selenocyanate

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