Inorganic Chemistry, Vol.34, No.12, 3134-3141, 1995
Structures and Magnetic-Susceptibility Studies of 4 New High-Nuclearity Copper(II) Halide Oligomers
The syntheses, crystal structures, and powder magnetic studies of several new quasi-planar bibridged Cu(n)X(2n+2)(2-) oligomers (n = 3, 4, 6, and 7; X = Cl or Br) are reported, based on the 1-methylpyridinium (C6H8N)(+) and 1,2-dimethylpyridinium (C7H10N)(+) cations. These include (C7H10N)(2)Cu3Br8, (C6H8N)(2)Cu4Cl10, (C7H10N)(2)Cu6Cl14, and (C7H10N)(2)Cu7Br16. Crystallographic data : (C7H10N)(2)Cu3Br8, triclinic, space group P (1) over bar, a = 7.947(2) Angstrom, b = 8.799(2) Angstrom, c = 9.840(2) Angstrom, alpha = 86.95(2)degrees, beta = 76.23(2)degrees, gamma = 71.54(2)degrees, V = 633.6(3) Angstrom(3), Z = 2, d(x) = 2.78 g/cm(3), and R = 0.0483; (C6H8N)(2)Cu4Cl10, monoclinic, space group P2(1)/n, a = 11.759(2) Angstrom, b = 9.056(2) Angstrom, c = 12.048(3) Angstrom, beta = 106.21(2)degrees, V = 1232.1(5) Angstrom(3), Z = 2, d(x) = 2.15 g/cm(3), and R = 0.0321; (C7H10N)(2)Cu6Cl14, triclinic, P (1) over bar, a = 8.997(3) Angstrom, b = 9.288(3) Angstrom, c = 11.540(4) Angstrom, alpha = 80.53(2)degrees, beta = 67.82(2)degrees, gamma = 60.22(2)degrees, V = 714.7(4) Angstrom(3), Z = 1, d(x) = 2.34 g/cm(3), and R = 0.0363; (C6H8N)(2)Cu7Br16, triclinic, P (1) over bar, a = 7.237(2) Angstrom, b = 10.880(2) Angstrom, c = 12.880(2) Angstrom, alpha = 89.47(2) Angstrom, beta = 75.08(2)degrees, gamma = 79.48(2)degrees, V = 962.7(3) Angstrom(3), Z = 1, d(x) = 3.35 g/cm(3), and R = 0.0520. : (C7H10N)(2)Cu3Br8, triclinic, space group P (1) over bar, a = 7.947(2) Angstrom, b = 8.799(2) Angstrom, c = 9.840(2) Angstrom, alpha = 86.95(2)degrees, beta = 76.23(2)degrees, gamma = 71.54(2)degrees, V = 633.6(3) Angstrom(3), Z = 2, d(x) = 2.78 g/cm(3), and R = 0.0483; (C6H8N)(2)Cu4Cl10, monoclinic, space group P2(1)/n, a = 11.759(2) Angstrom, b = 9.056(2) Angstrom, c = 12.048(3) Angstrom, beta = 106.21(2)degrees, V = 1232.1(5) Angstrom(3), Z = 2, d(x) = 2.15 g/cm(3), and R = 0.0321; (C7H10N)(2)Cu6Cl14, triclinic, P (1) over bar, a = 8.997(3) Angstrom, b = 9.288(3) Angstrom, c = 11.540(4) Angstrom, alpha = 80.53(2)degrees, beta = 67.82(2)degrees, gamma = 60.22(2)degrees, V = 714.7(4) Angstrom(3), Z = 1, d(x) = 2.34 g/cm(3), and R = 0.0363; (C6H8N)(2)Cu7Br16, triclinic, P (1) over bar, a = 7.237(2) Angstrom, b = 10.880(2) Angstrom, c = 12.880(2) Angstrom, alpha = 89.47(2) Angstrom, beta = 75.08(2)degrees, gamma = 79.48(2)degrees, V = 962.7(3) Angstrom(3), Z = 1, d(x) = 3.35 g/cm(3), and R = 0.0520. : (C7H10N)(2)Cu3Br8, triclinic, space group P (1) over bar, a = 7.947(2) Angstrom, b = 8.799(2) Angstrom, c = 9.840(2) Angstrom, alpha = 86.95(2)degrees, beta = 76.23(2)degrees, gamma = 71.54(2)degrees, V = 633.6(3) Angstrom(3), Z = 2, d(x) = 2.78 g/cm(3), and R = 0.0483; (C6H8N)(2)Cu4Cl10, monoclinic, space group P2(1)/n, a = 11.759(2) Angstrom, b = 9.056(2) Angstrom, c = 12.048(3) Angstrom, beta = 106.21(2)degrees, V = 1232.1(5) Angstrom(3), Z = 2, d(x) = 2.15 g/cm(3), and R = 0.0321; (C7H10N)(2)Cu6Cl14, triclinic, P (1) over bar, a = 8.997(3) Angstrom, b = 9.288(3) Angstrom, c = 11.540(4) Angstrom, alpha = 80.53(2)degrees, beta = 67.82(2)degrees, gamma = 60.22(2)degrees, V = 714.7(4) Angstrom(3), Z = 1, d(x) = 2.34 g/cm(3), and R = 0.0363; (C6H8N)(2)Cu7Br16, triclinic, P (1) over bar, a = 7.237(2) Angstrom, b = 10.880(2) Angstrom, c = 12.880(2) Angstrom, alpha = 89.47(2) Angstrom, beta = 75.08(2)degrees, gamma = 79.48(2)degrees, V = 962.7(3) Angstrom(3), Z = 1, d(x) = 3.35 g/cm(3), and R = 0.0520.