Assembly of two coordination polymers [Cu(BIM)(suc)]_n and [Cd(BIM)(ox)(H₂O)]_n constructed from bis(imidazol-1-yl)methane

Abstract

Two coordination polymers [Cu(BIM)(suc)] _n (1) and [Cd(BIM)(ox)(H₂O)] _n (2) (where BIM = bis(imidazol-1-yl)methane, suc = succinic dianion, and ox = oxalic dianion) have been solvothermally synthesized and characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in the monoclinic space group C2/c with a = 12.2302(8) Å, b = 11.4007(6) Å, c = 10.1791(6) Å, β = 118.4090(10)°, V = 1248.38(13) ų, and Z = 4. Cu(II) is square planar with nitrogen from BIM ligand and oxygen from the suc in the trans arrangement. Each BIM is bidentate bridging two Cu(II)s to generate a 1-D zigzag chain; the suc bridges two Cu(II)s in a monodentate gauche conformation, which results in the formation of wavy 2-D (4, 4) grid arrays. Complex 2 crystallizes in the monoclinic space group P2(1)/n with a = 10.8042(3) Å, b = 9.1053(2) Å, c = 12.0134(6) Å, β = 96.394(1)°, V = 1174.47(7) ų, and Z = 4. Cd(II) is coordinated in a distorted decahedral geometry. Each BIM is bidentate bridging two Cd(II)s to form a 1-D infinite zigzag chain; each ox bridges two neighboring Cd(II)s in a distinct zigzag chain in a chelating/chelating coordination mode, which extends the 1-D chain to a 2-D supramolecular network.

Keywords:

• Cadmium
• Copper
• Bis(imidazol-1-yl)methane
• Crystal structure
• Oxalate
• Succinate

Acknowledgments

This study was supported by the Natural Science Foundation of Hubei Province (2009CDB349 and 2006ABB038), the Distinguished Young Scholars’ Programs, HBDE (Z201022001, Q200722003, and CXY2009B028), and the Science and Technology Foundation for Creative Research Group of HBNU (2009).