Synthesis and molecular structure of the polar, binuclear complex, monochlorotetra-(6-fluoro-2-oxopyridine)diruthenium(II,III)
作者： Akhil R. Chakravarty , F.Albert Cotton , Willi Schwotzer
DOI: 10.1016/S0277-5387(00)84862-7
关键词: Cyclic voltammetry 、 Bond order 、 Molecule 、 Tetragonal crystal system 、 Inorganic compound 、 Crystallography 、 Stereochemistry 、 X-ray crystallography 、 Crystal structure 、 Chemistry 、 Ruthenium
摘要: Abstract The dark purple title compound was prepared by reaction of Ru2Cl(O2CCH3)4 with molten 6-fluoro-2-hydroxypyrine (Hfhp) in quantitative yield. Crystals composition Ru2Cl(fhp)4 were obtained slow diffusion hexane into a CH2Cl2 solution the compound. crystals belong to tetragonal space group I4mm following unit-cell dimensions: = b 10.890(2) A, c 13.178(4) α β γ 90.0°, V 1562.8(6) A3, and Z 2. molecule, which has crystallographic 4mm (C4c) symmetry, contains diruthenium(II,III) unit metalmetal bond order 2.5. four bridging fhp ligands across Ru2 are oriented one direction form polar molecule. coordinatioin spheres two ruthenium atoms [Ru(1) Ru(2)] Ru(2)N(I)4 Ru(1)Cl(1)O(1)4, respectively. axial site on Ru(1) is blocked F(1) atoms. Ru(1)Ru(2), Ru(2)Cl(1), Ru(2)O(1) Ru(1)N(1) distances 2.284(1), 2.427(3), 1.971(2) 2.089(4) electronic spectrum shows strong bands at 552 nm (e 4720 M−1 cm−1) 355 e 3770 cm−1). Cyclic voltammetry presence 0.1 M [N(C2H5)4]ClO4 100 mV s−1 quasireversible metal-centered one-electron oxication reduction processes +1.68 (ΔEp 120 mV) −0.01 126 mV), respectively, vs an AgAgCl reference electrode.
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