| || Synthesis and Characterisation of Addition Compounds of Pyridine Carboxylic Acid Hydrazides with Tin IV Halides, Organotin IV Halides and Thicyanates
Author : Rao, D.S.S. Vara Prasada ;Aggarwal, R.C.
Source : Defence Science Journal ; Vol:31(2) ; 1981 ; pp 167-172
Subject : 547 Organic Chemistry;54 Chemistry
Keywords : Di adducts ;Pyridine nitrogen;Terminal nitrogen;IR spectral studies;DMF
Abstract : Addition compounds of the compositions SnX/sub 4/.xL and R/sub n/SnX/sub 4-n/.xL where X=Cl/sup -/, Br/sup -/, I/sup -/, or (NCS)/sup -/, R=phenyl or n-butyl, L = picolinic acid hydrazide (PH), nicotinic acid hydrazide (NH) or isonicotinic acide hydrazide (INH), x=1 or 2 and n= 1,2 or 3 have been prepared and characterised with the help of elemental analysis, molar conductance, UV and IR spectral studies. All the adducts are nonionic as evidenced from their low molar conductances in DMF. UV and IR spectral studies show that NH and INH coordiante through carbonyl oxygen and terminal nitrogen; and (PH) through carbonyl oxygen and ring nitrogen in monoadducts. All the three isometric pyridine carboxylic acid hydrazides are coordinated through pyridine nitrogen alone in the di-adducts. Octahedral geometry has been proposed for mono-as well as di-adducts.