ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Coordination-chemistry of cis-Trioxotungsten(VI) Complexes. Crystal Structures of LWO3 · 3 H2O, [L′WO2(OH)]Br, [LWO2Br]Br, [L2W2O5](S2O6) · 4 H2O and [LWO2(μ-O)WO(O2)2(OH2)] (L = 1,4,7-Triazacyclonane; L′ = 1,4,7-Trimethyl-1,4,7-triazacyclononane)The cyclic triamines 1,4,7-triazacyclononane (L; C6H15N3) and 1,4,7-trimethyl-1,4,7-triazacyclononane (L′; C9H21N3) react in aqueous solution with WO3 affording LWO3 · 3 H2O, 1, and L′WO3 · 3 H2O, respectively, which yield [L′WO2(OH)]Br, 2, and [LWO2Br]Br, 3, in concentrated HBr solutions. In aqueous CH3SO3H solution 1 dimerizes. The iodide and dithionate 4 salts of [L2W2O5]2+ have been isolated. In 35% H2O2 complex 1 yields the neutral species [LWO2(μ-O)WO(O2)2(H2O)] 5. The crystal structures of 1-5 have been determined by X-ray analysis. Crystal data: 1: P21/c; a = 7.729(2), b = 14.887(3), c = 10.774(2) Å, β = 90.77(2)°, Z = 4; 2: Cc; 8.910(3), b = 12.220(6), c = 13.279(6) Å, β = 101.31(3)°, Z = 4; 3: Cmc21, a = 8.857(5), b = 12.062(7), c = 11.218(7) Å, Z = 4; 4: Cc, a = 17.601(7), b = 12.906(7), c = 14.107(8) Å, β = 124.08(4)°, Z = 4; 5: P212121; a = 8.452(4), b = 11.301(6), c = 13.750(6) Å, Z = 4.
Notes:
Die cyclischen Triamine 1,4,7-Triazacyclononan (L; C6H15N3) und 1,4,7-Trimethyl-1,4,7-triazacyclononan (L′; C9H21N3) reagieren in wäßriger Lösung mit WO3 zu LWO3 · 3 H2O, 1, bzw. L′WO3 · 3 H2O, deren Umsetzung mit HBr zu [L′WO2(OH)]Br, 2, bzw. [LWO2(Br)]Br, 3, führt. In wäßriger CH3SO3H-Lösung dimerisiert 1 zu [L2W2O5]2+, das als Iodidoder Dithionatsalz, 4, kristallin erhalten wurde. Mit 35% H2O2 reagiert 1 unter Bildung des zweikernigen Neutralkomplexes [LWO2(μ-O)WO(O2)2(H2O)], 5. Die Kristallstrukturen von 1-5 wurden bestimmt. Kristalldaten 1: P21/c; a = 7,729(2), b = 14,887(3), c = 10,774(2) Å, β = 90,77(2)°, Z = 4; 2: Cc; 8,910(3), b = 12,220(6), c = 13,279(6) Å, β = 101,31(3)°, Z = 4; 3: Cmc21, a = 8,857(5), b = 12,062(7), c = 11,218(7) Å, Z = 4; 4: Cc, a = 17,601(7), b = 12,906(7), c = 14,107(8) Å, β = 124,08(4)°, Z = 4; 5: P212121; a = 8,452(4), b = 11,301(6), c = 13,750(6) Å, Z = 4.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19905870119
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