Criteria for Liquid Crystal Formation in 5-Alkoxy-, 5-Alkylamino-, and 5-Alkanoyl-tropolone Complexes of Transition Metals (Cu<sup>II</sup>, Zn<sup>II</sup>, Ni<sup>II</sup>, Co<sup>II</sup>, UO<sub>2</sub><sup>VI</sup>, VO<sup>IV</sup>). The First Uranium Metallomesogen. Crystal Structure of Bis(5-hexadecyloxytropolonato)copper(II)
作者:James M. Elliott、John R. Chipperfield、Stephen Clark、Simon J. Teat、Ekkehard Sinn
DOI:10.1021/ic0101026
日期:2002.1.1
be mesogenic, it may be Cu(II) or UO(2)(VI) but not Ni(II), Zn(II), Co(II), or VO(IV). The crystal structure of bis(5-hexadecyloxytropolonato)copper(II) shows how, even in the crystalline state, molecular packing is dominated by the interactions between alkyl chains, together with copper-oxygen interactions. In the Cu(II) complexes, strong interactions occur between Cu atoms and O atoms of neighboring
据报道和解释双(5-烷氧基tropolonato)铜(II)的中间相性质的d层间距,这表明烷基链的大量缠绕。介晶性质取决于5-取代基的性质:要具有介晶性,它必须是n> 8的烷氧基,而不能是5-烷酰基或5-烷基氨基。金属的性质也很重要:要具有介晶作用,它可能是Cu(II)或UO(2)(VI),但不是Ni(II),Zn(II),Co(II)或VO(IV) 。双(5-十六烷基氧基tropolonato)铜(II)的晶体结构表明,即使在结晶状态下,分子堆积也如何被烷基链之间的相互作用以及铜-氧相互作用所支配。在Cu(II)配合物中,Cu原子与相邻分子的O原子之间发生强相互作用。这些比烷基-烷基相互作用强,因此支配了邻居之间的烷基-烷基相互作用,否则它们决定介晶性质的可能性和性质。Cu.O相互作用足以破坏烷基-烷基链相互作用以产生中间相。在T(d)()Zn(II)和Co(II)配合物中无法获得这种相