Narasimha N. Murthy

Department Of Chemistry

Gnana Sutha Siluvai

Babu Varghese

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

The perchlorate salt of the novel diprotonated dinucleating ligand 1,3-bis{[2-(2-pyridinio)ethyl][2-(2-pyridyl)ethyl]amino}benzene.

Acta Crystallographica Section C: Crystal Structure Communications

A dinuclear copper(II) complex [Cu2(PD)(DPP-) 2](ClO4)2 (1) incorporating a constrained binucleating hexadenate ligand, PD (1,3-bis{bis[(2-pyridyl)ethyl]amino}benzene), and coligand, DPP- (diphenylphosphate) was synthesized and characterized, with a specific outlook towards evaluating spectroscopic and H2O2 reactivity relevant to the active-sites of noncoupled dinuclear copper enzymes, DβM and PHM. In solution, complex 1 exhibits a broad 1H NMR in the range -25 to +60 ppm and has a solution magnetic moment (μ) of ∼2.0 B.M./Cu(II), typical of a noninteracting dicopper(II) center. The room temperature H2O2 reactivity of 1 monitored by UV-Vis spectroscopy reveals the formation of a copper(II)-dioxygen intermediate 1a, which in turn leading to a arene ligand hydroxylation (PD-O-) and thus provide a new doubly-bridged dicopper(II) complex, [Cu2(PD-O-)(DPP-)](ClO4) 2 (2). The dioxygen intermediate produces OPPh3 on treatment with PPh3 revealing it is an electrophilic hydroperoxide oxidant. Solution magnetic moment of 1.61 B.M./Cu(II) indicates the product complex 2 is a moderately interacting dicopper(II) center and its 1H NMR spans between -20 and +180 ppm. A comparison of the optical absorption features of complex 1a with related dinuclear hydroperoxo-copper(II) complexes is discussed. © 2011 Elsevier B.V.

Inorganica Chimica Acta

H2O2 reactivity of a dinuclear copper(II) complex incorporating a constrained binucleating polyaminopyridyl ligand and a phosphodiester coligand

Journal of Applied Crystallography

SIR92 – a program for automatic solution of crystal structures by direct methods

Acta Crystallographica Section A

A semi-empirical method of absorption correction

The perchlorate salt of the novel diprotonated dinucleating ligand 1,3-bis{[2-(2-pyridinio)ethyl]-[2-(2-pyridyl)ethyl]amino}benzene

Journal	Acta Crystallographica Section C: Crystal Structure Communications
ISSN	01082701
Open Access	No