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Pseudo-merohedrally twinned tetrakis(1H-imidazole-κN3)bis(N-nitrocyanamidato-κN)copper(II)

Jesus Garcia Diaz ; Jozef Kozisek ; Marek Fronc ; Anton Gatial ; Ingrid Svoboda ; Vratislav Langer (Institutionen för kemi- och bioteknik, Oorganisk miljökemi)
Acta Crystallographica, Section C : Crystal Structure Communications (0108-2701). Vol. C61 (2005), 4, p. m180-m182.
[Artikel, refereegranskad vetenskaplig]

Crystals of the title complex, [Cu(CN3O2)2(C3H4N2)4], the structure of which has been determined by single-crystal X-ray diffraction at 304 K, appear to be pseudo-merohedrally twinned. Transformation to a monoclinic C-centred cell was necessary in order to derive the twin law. Twin refinement in a triclinic unit cell significantly reduced the R value. The asymmetric unit of the triclinic cell consists of one molecule in a general position and two half entities with the Cu atom on a centre of inversion. The coordination of the Cu atom is quasi-octahedral, with four imidazole N-atom donors in the equatorial plane and two cyano N atoms from the N-nitrocyanamidate anion in axial positions. Owing to symmetry in the centrosymmetric molecules, the trans imidazole ligands are parallel, while those in the non-centrosymmetric molecule make angles of 22.8(2) and 77.9(2)°.

Nyckelord: X-ray diffraction, psedo-merohedral twin



Denna post skapades 2006-08-25. Senast ändrad 2007-10-18.
CPL Pubid: 3722

 

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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)

Ämnesområden

Kemi

Chalmers infrastruktur