Syntheses and crystal structures of three new borates templated by transition-metal complexes in situ

摘要

Three new cobalt borate compounds. [Co(DlEN)(2)][B5O6(OH)(4)] (DIEN = diethylenetriamine) (1). [B5O7(OH)(3)Co(TREN)] (TREN tris(2-aminoethyl)amine) (2). and [Co-2(TETA)(3)][B5O6(OH)(4)](4) (TETA = triethylenetetramine) (3) have been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, IR, elemental analysis and thermogravimetry. The structures exhibit interesting 3D supramolecular hydrogen-bonded architectures, involving the similar borate polyanion [B5O6+n(OH)(4-n)](,(n+1)=) (n = 0 for 1 and 3. and n = 1 for 2) and the templating transition metal complexes which are generated in situ under mild solvothermal conditions. Crystal data: 1, monoclinic, space group C2/m (No. 12) a = 15.2372(3) angstrom, h = 11.5987(2) angstrom. c = 8.4163(3) angstrom. beta = 93.601(4)degrees, V = 1484.49(7) angstrom(3), Z = 2: 2, monoclinic, P2(1)/c (No. 14), a 8.9881(3) angstrom, b = 20.7648(5) angstrom, c = 9.368 1(2) angstrom, beta = 99.926(4)degrees. V = 1722.25(8) angstrom(3), Z = 4: 3, triclinic, space group P-1 (No. 2), a = 12.3717(4) angstrom, b= 20.7648(5) angstrom, c = 19.0925(3) angstrom, alpha = 77.009(5)degrees. beta = 80.095(2)degrees. gamma = 82.334(3)degrees. V = 2925.3(2) angstrom(3), Z = 2. (C) 2006 Elsevier Inc. All rights reserved.