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Title: Macrocyclic metal complexes: Part XXII-Dinuclear macro cyclic fluoroborobridged complexes of cobalt(II) and nickel(II)
Authors: Mohapatra, B K
Rout, A K
Pujapanda, P K
Bhattacharya, U
Sahoo, B
Issue Date: Nov-1991
Publisher: NISCAIR-CSIR, India
Abstract: Dinuclear fluoroboro-bridged macrocyclic complexes have been synthesised by treating boron trifluoride on bis-(diacetylazinedihydrazone)dinickel(II)/dicobalt(II) complexes. The complexes possess the stoichiometry [M2(DAADHBF2)2X4] (BF4)2 {M= Co(II), X = Cl- , Br-, I-, SCN-; M = Ni(II), X = SCN-}. They are ionic in nature and the IR spectral data show the existence of fluoroboro groups as > BF and BF species. Pairs of former group occur as bridgeheads, each encompassing two adjacent NH2groups in the inner-sphere of the macrocyclic ligand frame and the latter occupies the outer coordination sphere of the complex. Polarographic redox studies show three single-electron redox steps and the thermodynamic parameters, viz. E 1/21.2, values point to the macrocyclic structure of the complexes.
Page(s): 944-947
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.30A(11) [November 1991]

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