Received 4 September 2011
The MnII ion in the title complex, [MnI2(C10H8N2)2], is six-coordinated in a distorted cis-N4I2Mn octahedral environment by four N atoms of the two chelating 2,2'-bipyridine ligands and two iodide anions. As a result of the different trans effects of the N and I atoms, the Mn-N bonds trans to the I atom are slightly longer than the Mn-N bonds trans to the N atom. The dihedral angle between the approximately planar ligands [maximum deviation = 0.064 (7) Å] is 75.0 (1)°. Numerous inter- and intramolecular - interactions between the pyridyl rings are present, the shortest centroid-centroid distance being 3.905 (5) Å. The structure reported herein represents a new monoclinic polymorph of the previously reported monoclinic (P21/c) form [Ha (2011). Z. Kristallogr. New Cryst. Struct. 226, 187-188].
Data collection: SMART (Bruker, 2000); cell refinement: SAINT (Bruker, 2000); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: SHELXL97.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: NG5226 ).
This work was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010-0029626).