The reaction of Cu(ClO4)2*6H2O with RPO3H2 (R = cyclopentyl, isopropyl, trichloromethyl) in the presence of chelatingnitrogenligands bpya or bpy afforded dinuclear copper phosphonates [Cu2(μ2-C5H9PO3)2(bpya)2(H2O)2] (H2O)4 (1), [Cu2(μ2-C3H7PO3)2(bpya)2(H2O)2] (H2O)2 (2) and [Cu2(μ2-CCl3PO3)2(bpy)2(MeOH)2] (H2O) (3) [bpya = 2,2′-bipyridylamine, bpy = 2,2′-bipyridine]. The molecular structures of these
Dealkylation Reaction of Acetals, Phosphonate, and Phosphate Esters with Chlorotrimethylsilane/Metal Halide Reagent in Acetonitrile, and Its Application to the Synthesis of Phosphonic Acids and Vinyl Phosphates
A mild and efficient method has been developed for carbon-oxygen bond cleavage using chlorotrimethylsilane/sodium iodide in acetonitrile. It was applied to synthetic transformation undernonaqueous and neutral conditions, such as acetal deprotection and the synthesis of phosphonic acids from the corresponding dialkyl phosphonates via methanolysis of their silyl esters. Effectiveness of various kinds
已经开发出一种在乙腈中使用三甲基氯硅烷/碘化钠进行碳氧键断裂的温和有效的方法。它被应用于非水和中性条件下的合成转化,如缩醛脱保护和从相应的膦酸二烷基酯通过其甲硅烷基酯的甲醇分解合成膦酸。通过 1 H NMR 在乙腈溶液中检测了各种金属碘化物或碘化铵对此类脱烷基作用的有效性。用碘化锂或碘化钾代替碘化钠也获得了令人满意的结果。然而,铜(I)或碘化季铵是无效的。乙腈中的氯三甲基硅烷/溴化锂对多功能膦酸酯或二烷基乙烯基磷酸酯的选择性脱烷基作用有效。
Distorted cubic tetranuclear vanadium(iv) phosphonate cages: double-four-ring (D4R) containing transition metal ion phosphonate cages
phosphorus atoms in the alternatecorners of the cube. The edges of the cube contain oxygen atoms derived from the phosphonate ligand. The phosphonate ligand in both of these compounds is dianionic and helps to bind to three V(IV) centers. The faces of the cubic ensembles contain puckered V2P2O4 eight-membered rings. The V(IV) center in 1 is six-coordinate in a distorted octahedral geometry while in 2
VCl 3与3,5-二甲基吡唑(3,5-Me 2 PzH)和三氯甲基膦/叔丁基膦酸 在......的存在下 三乙胺作为氯化氢清除剂,可得到四核V(IV)组装体,[(VO)4(3,5-Me 2 PzH)8(CCl 3 PO 3)4 ](1)和[(VO)4(3,5) -Me 2 PzH)4(t -BuPO 3)4 ](2)。这两种化合物均具有包含V(IV)离子和磷原子在立方体的交替角中。立方体的边缘包含衍生自膦酸酯配体的氧原子。这两种化合物中的膦酸酯配体都是双阴离子的,有助于与三个V(IV)中心结合。三次合奏的面包含皱褶的V 2 P 2 O 4八元环。V(IV)中心在扭曲的八面体几何中为1坐标,而在2中则为扭曲的方锥体几何中的5坐标。对1和2进行的磁研究表明,V(IV中心通过膦酸酯配体的介导彼此反铁磁耦合,尽管是弱耦合的。
Isomorphic Co(ii) and Zn(ii) phosphonates: co-crystal formation of [{M2(η1-DMPzH)4(Cl3CPO3)2}{M(η1-DMPzH)2Cl2}2](toluene)2 (M = Co(ii) and Zn(ii))
作者:Vadapalli Chandrasekhar、Dipankar Sahoo、Ramesh K. Metre
DOI:10.1039/c3ce40997j
日期:——
Two pairs of isomorphic molecular phosphonates are reported. The first isomorphic pair involves the co-crystals [Co2(η1-DMPzH)4(Cl3CPO3)2}Co(η1-DMPzH)2Cl2}2](toluene)2 [1] and [Zn2(η1-DMPzH)4(Cl3CPO3)2}Zn(η1-DMPzH)2Cl2}2](toluene)2 [2] while the second isomorphic pair is Co2(η1-DMPzH)2Cl2(Cl3CPO3)2}(HNEt3)2 [3] and Zn2(η1-DMPzH)2Cl2(Cl3CPO3)2}(HNEt3)2 [4]. These have been prepared by multi-component reactions involving normal solution-state synthesis at room temperature. Change of reaction solvent from acetonitrile to methanol affords change of products from 1 and 2 to 3 and 4.
Molecular Iron(III) Phosphonates: Synthesis, Structure, Magnetism, and Mössbauer Studies
作者:Joydeb Goura、Prasenjit Bag、Valeriu Mereacre、Annie K. Powell、Vadapalli Chandrasekhar
DOI:10.1021/ic5012154
日期:2014.8.4
yrazole], afforded tetra- and pentanuclear Fe(III) phosphonate complexes [Fe4(t-BuPO3)4(HphpzH)4]·5CH3CN·5CH2Cl2 (1) and [HNEt3]2[Fe5(μ3-O)(μ-OH)2 (Cl3CPO3)3(HphpzH)5(μ-phpzH]·3CH3CN·2H2O (2). Single-crystal X-ray structural analysis reveals that 1 possesses a cubic double-4-ring (D4R) core similar to what is found in zeolites. The molecular structure of 2 reveals it to be pentanuclear. It crystallizes