ScCl(3)(THF)(3) or YCl(3) in a 1:1 molar ratio under reflux for 8 h with [Li(bdmpza)(H(2)O)}(4)] [bdmpza = bis(3,5-dimethylpyrazol-1-yl)acetate], [Li(bdmpzdta)(H(2)O)}(4)] [bdmpzdta = bis(3,5-dimethylpyrazol-1-yl)dithioacetate], and (Hbdmpze) [bdmpze = 2,2-bis(3,5-dimethylpyrazol-1-yl)ethoxide] affords the corresponding complexes [MCl(2)(kappa(3)-bdmpzx)(THF)] (x = a, M = Sc (1), Y (2); x = dta, M = Sc
ScCl(3)(THF)(3)或YCl(3)以1:1摩尔比与[Li(bdmpza)(H(2)O)}(4)]在回流下反应8小时[ bdmpza =双(3,5-二甲基吡唑-1-基)乙酸酯],[Li(bdmpzdta)(H(2)O)}(4)] [bdmpzdta =双(3,5-二甲基吡唑-1-基)乙酸二硫代乙酸酯]和(Hbdmpze)[bdmpze = 2,2-双(3,5-二甲基吡唑-1-基)乙醇]提供相应的配合物[MCl(2)(kappa(3)-bdmpzx)(THF)]( x = a,M = Sc(1),Y(2); x = dta,M = Sc(3),Y(4); x = e,M = Sc(5),Y(6))。但是,当反应在ScCl(3)(THF)(3)和[Li(bdmpzdta)(H(2)O)}(4)]之间回流下进行1小时时,新的阴离子络合物[Li得到(THF)(4)] [ScCl(3)
New Complexes of Niobium(
<scp>V</scp>
) and Tantalum(
<scp>V</scp>
) with Monoanionic NNO Heteroscorpionate Ligands
作者:Antonio Otero、Juan Fernández‐Baeza、Antonio Antiñolo、Juan Tejeda、Agustín Lara‐Sánchez、Luis Sánchez‐Barba、Ana M. Rodríguez
DOI:10.1002/ejic.200300451
日期:2004.1
48 h, the oxo complexes [MCl2(O)(κ3-bdmpzx)] (x = a, M = Nb 6, Ta 7; x = e, M = Nb 8, Ta 9) were isolated. The structures of these complexes have been determined by spectroscopic methods and the X-ray crystal structure of 8 has been established. Finally, a new class of heteroscorpionate-metal complexes containing an alkoxide ligand has been prepared. Direct reaction of the complexes [MCl4(κ3-bdmpza)]
基于双(3,5-二甲基吡唑-1-基)乙酸(Hbdmpza) (1) 的新合成路线得到了醇2,2-双(3,5-二甲基吡唑-1-基)乙醇(Hbdmpze)产量良好。这种醇和相关的锂化合物 [Li(bdmpza)(H2O)}4] 是将这些蝎形配体引入过渡金属配合物的极好前体。例如,锂化合物和 Hbdmpze(后者在预先加入 nBuLi 之后)与 MCl5(M = Nb,Ta)的 THF 溶液反应,在 -70 °C 搅拌 12 小时后,得到一种溶液,其中复合物 [MCl4(κ3-bdmpzx)] (x = a, M = Nb 2, Ta 3; x = e, M = Nb 4, Ta 5) 已被分离出来。当 2-5 的 THF 溶液在约 20 °C 48 小时,氧配合物 [MCl2(O)(κ3-bdmpzx)] (x = a,M = Nb 6,Ta 7;x = e,M = Nb 8,Ta 9)。这
New Complexes of Zirconium(IV) and Hafnium(IV) with Heteroscorpionate Ligands and the Hydrolysis of Such Complexes To Give a Zirconium Cluster
A series of zirconium and hafnium heteroscorpionate complexes have been prepared by the reaction of MCl4 (M = Zr, Hf) with the compounds [[Li(bdmpza)(H2O)](4)] [bdmpza = bis(3,5-dimethylpyrazol-1-yl)acetate], [[Li(bdmpzdta)(H2O)](4)] [bdmpzdta = bis(3,5-dimethylpyrazol-1-yl)dithioacetate], and (Hbdmpze) [bdmpze = 2,2-bis(3,5-dimethylpyrazol-1-yl)ethoxide] (the latter with the prior addition of Bu(n)Li)
The reaction of (OC)5MnBr with bis(3,5-dimethyl-1-pyrazolyl)methane yields [(PzMe2)2CH2}Mn(CO)3Br] (1). The use of tridentate heteroscorpionates such as bis(3,5-dimethyl-1-pyrazolyl)acetic acid and 2,2-bis(3,5-dimethyl-1-pyrazolyl)ethanol leads to the formation of mononuclear [(OC)3Mn(PzMe2)2CH–CO2}] (2) and [(OC)3Mn(PzMe2)2CH–CH2OH}]Br (3, CORM-ONN1). Salt-like photoCORM 3 is soluble in aqueous
A Family of Dioxo−Molybdenum(VI) Complexes of N<sub>2</sub>X Heteroscorpionate Ligands of Relevance to Molybdoenzymes
作者:Brian S. Hammes、Bal S. Chohan、Justin T. Hoffman、Simon Einwächter、Carl J. Carrano
DOI:10.1021/ic049130p
日期:2004.11.1
Four new Mo(Vl)-dioxo complexes of a family of N2X heteroscorpionate ligands are reported which, together with data already available for (Tp(R))(-), provide a unique example of a comprehensive set of isostructural, isoelectronic complexes differing only in one biologically relevant donor atom. A study of these complexes allows for a direct comparison of structural, spectroscopic, and oxygen atom transfer reactivity properties of the Mo(Vl)-dioxo center (of relevance to various families of molybdoenzymes) as a function of donor atom identity.