Isopolyoxometalates derived from arylstibonic acids with “reverse-Keggin ion” structures based on [M(RSb)12O28] cores, M = Co(ii) or Zn(ii)
作者:Brian K. Nicholson、Christopher J. Clark、Shane G. Telfer、Tania Groutso
DOI:10.1039/c2dt30341h
日期:——
The preparations and structures are described of four new polyoxostibonates, [Co(p-MeC6H4Sb)12O28Co(H2O)3}4]Cl2·6H2O, [Co(p-ClC6H4Sb)12O28Co(H2O)3}4]Cl2·22H2O, (PhCH2NMe3)2[Zn(p-ClC6H4Sb)12O28Zn4Cl2.54Br1.46]·8MeCN·H2O and [BaCoH4(p-MeC6H4Sb)O28]·5H2O. Each of these has a framework of 12 (RSb) groups linked by 28 O atoms, with one transition metal ion in a tetrahedral site in the centre. Other metal
作者:Christopher J. Clark、Brian K. Nicholson、Cody E. Wright
DOI:10.1039/b816113e
日期:——
Electrospray ionisation mass spectrometry shows that arylstibonicacids, RSbO(3)H(2), give rise to oxo-bridged clusters derived from [H(8)(RSb)(12)O(28)] which act as inorganic crown ligands towards Na(+) cations; structure determination of one derivative revealed a cage-like anion [Na(2)H(9)(p-O(2)NC(6)H(4)Sb)(12)O(30).4H(2)O](-).
Synthesis and structural and magnetic characterisation of copper(ii) complexes of mixed phosphonate-antimonate ligands
作者:Shoaib Ali、Christopher A. Muryn、Floriana Tuna、Richard E. P. Winpenny
DOI:10.1039/b913467k
日期:——
contains two antimony centres, bridged by an oxide and two hydrogen phosphonates. Reaction with copper acetate under solvothermal conditions produces four new polymetallic copper complexes. With pyridine used as a base the major product is a tetracopper cage, [Cu4O2(SbAr)2(O3PtBu)2(O2CMe)2(OMe)6], with the four copper centres arranged in a rhombus; a minor product is a tricopper complex, [Cu3O4(SbAr)2(O3PtBu)4(py)3]
多核 氧 基于缩合的供体配体 对氯苯基锑酸(ArSbO 3 H 2)和叔丁基膦酸被报道。[(SbAr)2 O(HO 3 P t Bu)6 ]包含两个锑中心,由氧化物和两个膦酸氢盐桥接。与...反应醋酸铜 在溶剂热条件下产生四种新的多金属 铜复合体。和吡啶用作基础的主要产品是四铜笼,[Cu 4 O 2(SbAr)2(O 3 P t Bu)2(O 2 CMe)2(OMe)6 ],其中四个铜中心排列成菱形;次要产品是三铜配合物,[Cu 3 O 4(SbAr)2(O 3 P t Bu)4(py)3 ]。和OM作为基础,主要产物还是四核笼,但次要产物是杂金属笼,[Cu 5 Li 4 O 6(SbAr)4(O 3 P t Bu)6(O 2 CMe)2(OMe)4( MeOH)4 ]。和2,6-二甲基吡啶作为碱的octametallic络合物形成,[铜8 ø 4(SBAR)2(O 3 P吨丁基)6(O 2
Mixed antimonate-phosphonate ligands as polydentate bridging oxygen donors
作者:Shoaib Ali、Viswanathan Baskar、Christopher A. Muryn、Richard E. P. Winpenny
DOI:10.1039/b815270e
日期:——
A new class of oxygen donor ligands is described and preliminary results using these ligands are given which show they can be used to make polymetallic cages.
描述了一种新型的氧供体配体,并给出了使用这些配体的初步结果,表明它们可用于制造多金属笼。
Tetranuclear stiboxanes (RSb)4O6, exhibiting an adamantane-type structure
作者:Ananda Kumar Jami、Viswanathan Baskar
DOI:10.1039/c2dt30587a
日期:——
Depolymerization reactions of organostibonic acids with protic ligands have been investigated. Reaction of arylstibonic acids with 8-hydroxyquinoline (8-HQ), or 2-[1H-pyrazol-5(3)-yl]naphthalene-1-ol} (H2naphpz) in a 1 : 1 stoichiometry in refluxing toluene affords adamantane-like L4(RSb)4O6 clusters [(p-XC6H4Sb)4(O)6(Q)4] (where X = Cl (1), Br (2), QH = 8-hydroxyquinoline), [(p-ClC6H4Sb)4(O)6(Hnaphpz)4]·H2naphpz (3) and [(p-Br-C6H4Sb)4(O)6(Hnaphpz)4]2·H2naphpz (4). Further a tetrameric organoantimony oxo cluster, L4(RSb)4O4 [(p-ClC6H4Sb)4(O)4(naphpz)4] (5) has also been isolated as a side product in the reaction of arylstibonic acid with naphthylphenolic pyrazole. Interestingly 1–4 structurally resemble the dimeric form of the antimony oxide Sb2O3 and its mineral senarmontite.