Novel tetranuclear cubane-like Co(II) complexes involving chelate phosphoramide ligands
作者： Kateryna E Gubina , Vladimir A Ovchynnikov , Jolanta Swiatek-Kozlowska , Vladimir M Amirkhanov , Tatyana Yu Sliva
DOI: 10.1016/S0277-5387(02)00895-1
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摘要: Abstract Interaction of cobalt(II) ions and sodium carbacylamidophosphates Na(L) (HL=PhC(O)NHP(O)(NR2)2; where NR2 are morpholyl, HL1; NMe2, HL2; NEt2, HL3) in methanol solution afforded polynuclear alkoxo complexes [Co4{L1}3(OCH3)4(OH)(H2O)5·3H2O] 1 [Co4{L}4(OCH3)4(CH3OH)4] (L=L2 2, L3 3). Data spectral TGA studies presented. Coordination compounds 3 have been characterized by means X-ray diffraction. Both the structures consist tetranuclear cubane clusters with methoxide bridging three metal centers (CoO 2.068(3)–2.093(4) A) phosphorylic ligands coordinated a bidentatechelate fashion via carbonyl oxygen atoms 1: 2.050(2); 3: 2.031(4) phosphoryl groups (2.093(2) 2.106(4) A). Isolation these is an important proof for close resemblance behavior carbacylamidophosphate systems β-diketonates towards transition ions.
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