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Bond-valence approach to the coppercopper and coppernitrogen bonding in binuclear copper(II) complexes: Structure of tetrakis(2-iodobenzoato)bis(caffeine)dicopper(II) at 210 K by F. Valach; M. Tokarčı&́k; T. Maris; D.J. Watkin; C.K. Prout is a Chemistry article available to read on EtoBox.

What is Bond-valence approach to the coppercopper and coppernitrogen bonding in binuclear copper(II) complexes: Structure of tetrakis(2-iodobenzoato)bis(caffeine)dicopper(II) at 210 K about?

The crystal structure of tetrakis(2-iodobenzoato)bis(caffeine)dicopper(II) at 210 K is monoclinic, space group P2 1 /n (No.14), unit cell parameters a= 13.6090(4), b= 13.5900(2), c= 14.5370(4) A , , i= 116.394(1)°, Z =2 and D calc = 2.07 g cm -3 . The structure consists of centrosymmetric [Cu 2 (2IbzO) 4 (caf) 2 ] units (2IbzO =2-iodobenzoate, caf =caffeine). These binuclear units are mutually held by van der Waals forces. Cu atoms are pentacoordinated by four carboxylic O atoms in the basal plane and one apical N atom from the caffeine molecule. Cu O bond lengths are 1.961(3), 1.969(3), 1.969(2), 1.974(3) A , , and Cu N bond length is 2.238(3) A , . The displacement of Cu atom from the basal plane is 0.2354(4) A , . The calculated Cu(II) N bond length by bond-valence sum model is 2.31 A , . The Cu...Cu distance is 2.7041(6) A , . The non-bonding character of Cu(II)...Cu(II) contact in 26 binuclear carboxylic complexes with CuO 4 N chromophores is proved.

Who reads Bond-valence approach to the coppercopper and coppernitrogen bonding in binuclear copper(II) complexes: Structure of tetrakis(2-iodobenzoato)bis(caffeine)dicopper(II) at 210 K?

Author

F. Valach; M. Tokarčı&́k; T. Maris; D.J. Watkin; C.K. Prout

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-328X)

Published

2001

Language

EN

Field

Chemistry (Physical Sciences)