Effect of metal ions and length of alkylene bridge on the strength of hydrogen bonds in diiminedioxime cobalt(III) and nickel(II) complexes
作者:Panana Kitiphaisalnont、Santi Thohinung、Prapaipim Hanmungtum、Narongsuk Chaichit、Surapol Patrarakorn、Sutatip Siripaisarnpipat
DOI:10.1016/j.poly.2006.03.027
日期:2006.10
dichloro cobalt(III) complexes of 3,3′-(1,4 butanediyldinitrilo)bis(2-butanone)dioxime, complexes 1 and 2, respectively, crystallized in the orthorhombic system with space group P212121. Their average O O distances are 2.434(5) and 2.419(4) A, respectively. The trans-dichloro[3,3′-(1,2-ethanediyldinitrilo)bis(2-butanonedioximato)cobalt(III)] complex 3 crystallized in the monoclinic system with space
摘要3,3'-(1,4丁二基二苯并三)双(2-丁酮)二肟的八面体二硝基和二氯钴(III)配合物1和2均在正交晶系中以空间群P212121结晶。它们的平均OO距离分别为2.434(5)和2.419(4)A。反式二氯[3,3'-(1,2-乙二基二苯并三)双(2-丁酮二肟基)钴(III)]配合物3在单斜晶系空间群P21 / c中结晶。它的2.700(2)A的很长的OO距离表明,两个顺式肟之间没有氢键发生。这是因为两个亚胺氮之间的乙烯桥比丁烯桥对配体施加了更多的约束。3,3'-(1,4-丁烷二基二苯并三)双(2-丁酮)二恶唑甲酸酯的配合物4的方形平面镍(II)配合物在具有空间群P1的三斜晶系中结晶。平均OO距离为2.432(9)A,可与相应的钴配合物相比较。νOHO振动发生在1700–1800 cm-1区域,并且与OO距离成反比。配合物1、2和4的氢桥质子共振出现在低场(18–20 ppm)。对于复合物3,未观察到这种共振。