New nickel(ii) and iron(ii) helicates and tetrahedra derived from expanded quaterpyridines
作者:Christopher R. K. Glasson、George V. Meehan、Cherie A. Motti、Jack K. Clegg、Peter Turner、Paul Jensen、Leonard F. Lindoy
DOI:10.1039/c1dt10667h
日期:——
of solvated [Ni2(2)3](PF6)4, [(PF6) ⊂ Fe4(2)6](PF6)7, [Fe4(3)6](PF6)8 and [Ni4(3)6](PF6)8 have been determined, while the structure of the parent Fe(II) cage in the series, [(PF6) ⊂ Fe4(1)6](PF6)7, was reported previously. The internal volumes of the Fe(II) tetrahedral cages have been calculated and increase from 102 Å3 for [Fe4(1)6]8+ to 227 Å3 for [Fe4(2)6]8+ to 417 Å3 for [Fe4(3)6]8+ and to an impressive
作为涉及线性的先前研究的扩展 四吡啶配体,5,5''-二甲基-2,2':5',5':2'',2'''-四吡啶1,相关的扩展四吡啶吡啶衍生物2和3的合成,并掺入了二甲氧基取代的成对的2,2'-联吡啶基之间的1,4-亚苯基和四甲氧基取代的4,4'-联亚苯基通过5-溴-5'-甲基-2'-联吡啶之间的双铃木偶联反应进行以及使用微波加热的适当的二频哪醇-二硼酸酯。的反应2和3与所选择的Fe(II)或Ni(II)盐产生既[M的混合物2大号3 ] 4+三螺旋体和[M 4 L 6 ] 8+四面体,在特定情况下,所形成的产物的比例取决于反应条件;各自的产品都具有足够的惰性,可以进行色谱分离和分离。发现更长的反应时间和更高的浓度有利于四面体的形成。[Ni 2(2)3 ](PF 6)4,[(PF 6)⊂Fe 4(2)6 ](PF 6)7,[Fe 4(3))6 ](PF 6)8和[Ni 4(3)6 ](PF 6)