Bis(acetylacetonato-j 2 O,O 0 )(pyridine- jN)zinc(II) Sanjaya Brahma, a M. Srinidhi, b S. A. Shivashankar, a T. Narasimhamurthy a and R. S. Rathore c * a Materials Research Center, Indian Institute of Science, Bangalore 560 012, India, b Solid State Structural Chemistry Unit, Indian Institute of Science, Bangalore, 560 012, India, and c Bioinformatics Infrastructure Facility, School of Life Science, University of Hyderabad, Hyderabad 500 046, India Correspondence e-mail: rsrsl@uohyd.ernet.in Received 3 May 2011; accepted 25 May 2011 Key indicators: single-crystal X-ray study; T = 295 K; mean (C–C) = 0.004 A ˚ ; R factor = 0.040; wR factor = 0.106; data-to-parameter ratio = 15.1. In the title compound, [Zn(C 5 H 7 O 2 ) 2 (C 5 H 5 N)], the metal atom has square-pyramidal coordination geometry with the basal plane defined by the four O atoms of the chelating acetylacetonate ligands and with the axial position occupied by the pyridine N atom. The crystal packing is characterized by a C—HO hydrogen-bonded ribbon structure approxi- mately parallel to [10 1]. Related literature For related structures, see: Brahma et al. (2008); Neelgund et al. (2007); Urs et al. (2001). Experimental Crystal data [Zn(C 5 H 7 O 2 ) 2 (C 5 H 5 N)] M r = 342.68 Monoclinic, P2 1 =c a = 7.846 (5) A ˚ b = 27.047 (4) A ˚ c = 8.199 (5) A ˚ = 117.984 (3) V = 1536.5 (14) A ˚ 3 Z =4 Mo K radiation = 1.61 mm 1 T = 295 K 0.32 0.23 0.12 mm Data collection Bruker APEXII CCD area-detector diffractometer Absorption correction: multi-scan (SADABS; Bruker, 2004) T min = 0.64, T max = 0.83 10840 measured reflections 2939 independent reflections 2568 reflections with I >2(I) R int = 0.074 Refinement R[F 2 >2(F 2 )] = 0.040 wR(F 2 ) = 0.106 S = 0.99 2939 reflections 194 parameters H-atom parameters constrained Á max = 0.36 e A ˚ 3 Á min = 0.74 e A ˚ 3 Table 1 Hydrogen-bond geometry (A ˚ , ). D—HA D—H HA DA D—HA C13—H13O2 i 0.93 2.50 3.141 (5) 126 C14—H14O3 ii 0.93 2.59 3.500 (5) 165 C4—H4AO4 iii 0.96 2.41 3.304 (5) 155 Symmetry codes: (i) x þ 1; y; z þ 1; (ii) x þ 2; y; z þ 1; (iii) x; y þ 1 2 ; z 1 2 . Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT- Plus (Bruker, 2004); data reduction: SAINT-Plus; 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 and PLATON. We acknowledge the CCD facility, set up under the IRHPA–DST program at the Indian Institute of Science, Bangalore. SB thanks the Council of Scientific and Industrial research (CSIR), New Delhi, for the award of research asso- ciateship. RSR gratefully acknowledges the CSIR for funding under the scientist’s pool scheme. Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: NG5159). References Brahma, S., Sachin, H. P., Shivashankar, S. A., Narasimhamurthy, T. & Rathore, R. S. (2008). Acta Cryst. C64, m140–m143. Bruker (2004). APEX2, SAINT-Plus and SADABS. Bruker AXS Inc., Madison, Wisconsin, USA. Farrugia, L. J. (1997). J. Appl. Cryst. 30, 565. Neelgund, G. M., Shivashankar, S. A., Narasimhamurthy, T. & Rathore, R. S. (2007). Acta Cryst. C63, m74–m76. Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Spek, A. L. (2009). Acta Cryst. D65, 148–155. Urs, U. K., Anitha, K. C., Raghunathan, K. L., Shivashankar, S. A., Robinson, W. T. & Row, T. N. G. (2001). Acta Cryst. E57, m242–m243. metal-organic compounds Acta Cryst. (2011). E67, m819 doi:10.1107/S1600536811019854 Brahma et al. m819 Acta Crystallographica Section E Structure Reports Online ISSN 1600-5368