Research Article: A second triclinic polymorph of bis­(μ-N-nitroso-N-phenyl­hydroxy­laminato)-κ3O,O′:O′;κ3O′:O,O′-bis­[(N-nitroso-N-phenyl­hydroxy­laminato-κ2O,O′)lead(II)]

Date Published: June 01, 2012

Publisher: International Union of Crystallography

Author(s): Ezzatollah Najafi, Mostafa M. Amini, Seik Weng Ng.


The cupferronate ions in the centrosymmetric dinuclear title compound, [Pb2(C6H5N2O2)4], O,O′-chelate to the two PbII atoms; two of the four nitroso O atoms are also involved in bridging. The geometries of the five-coordinate PbII atoms in the two independent mol­ecules are Ψ-octa­hedral; if more remote Pb⋯O inter­actions are also considered, the coordination number is increased to six for one mol­ecule and to seven for the other. Their coordination polyhedra are ill defined in the chain motif, which runs along [100].

Partial Text

For the first triclinic polymorph, see: Najafi et al. (2011 ▶).