排序方式: 共有68条查询结果,搜索用时 31 毫秒
1.
用pH法在25.0±0.1℃,I=0.1mol·dm-3KNO3条件下,测定铜(Ⅱ)-4-(吡啶-2′-甲基)-1,4,7,10-四氮杂环十三烷-11,13-二酮-α-氨基酸(5-取代邻菲罗啉)三元配合物的稳定常数;比较了带吡啶甲基二氧四胺大环配体和二氧四胺大环配体与Cu(Ⅱ)的配位能力、配位方式;研究了该三元体系配合物稳定性与配体α-氨基酸酸碱强度之间的直线自由能关系;探讨了Cu(Ⅱ)和5-取代邻菲罗啉之间的d-p反馈π键以及邻菲罗啉取代基Hammett诱导效应与该三元配合物稳定性之间的关系。讨论了4-(吡啶-2′-甲基)-1,4,7,10-四氮杂环十三烷-11,13-二酮和4-(喹啉-2′-甲基)-1,4,7,10-四氮杂环十三烷-11,13-二酮与Cuxphen所形成配合物的不同空间结构及其对配合物稳定性产生的影响。 相似文献
2.
3.
喹啉基氮杂大环铜、镍配合物的结构和性质差异安道利,卜显和,李金亮,陈荣悌(南开大学化学系,天津300071)二氧四胺大环配体是Cu ̄(2+)、Ni ̄(2+)、Co ̄(2+)、Pt ̄(2+)等金属离子的优良配体,它们同时具有饱和大环多胺和寡聚肽的结构特... 相似文献
4.
5.
6.
设计合成了一个新型吡啶基二氮环配体L(N,N'-双(吡啶基-3-亚甲基)-1,5-二氮环辛烷)及其铜配位聚合物{[Cu(滋-H2L)(L)Cl](ClO4)3}∞(1),研究了此配合物的晶体结构、光谱及磁性质。该配合物属正交晶系,Pnma空间群,晶胞参数为a=3.5170(17)nm,b=1.0440(5)nm,c=1.1966(6)nm,V=4.394(4)nm3,Z=4。配体L以顺式螯合和反式桥联两种不同的配位形式将铜离子连接起来形成一维链状阳离子结构。 相似文献
7.
用 p H法在 (2 5.0± 0 .1 )℃ ,I=0 .1 mol· dm-3 KNO3 条件下 ,测定 Cu( ) - 4 - (喹啉 - 8′-甲基 ) - 1 ,4,7,1 0 -四氮杂环十三烷 - 1 1 ,1 3-二酮 -α-氨基酸或 5-取代邻菲罗啉两类三元配合物的稳定常数 ;研究了带甲基喹啉侧基大环多胺配体与 Cu( )离子的配位能力、配位方式 ;发现这两类三元体系配合物有特殊的稳定性 ;而且它们的稳定性与配体α-氨基酸及 5-取代邻菲罗啉酸碱强度之间的直线自由能关系的变化趋势相反 ;探讨了 Cu( )和 5-取代邻菲罗啉之间的 d- p反馈π键及其取代基 Hammett诱导效应的关系。 相似文献
8.
9.
An ion-pair compound,[HL]2[Ni(CN)4]·4H2O 1 has been obtained as an unexpected product when we attempt to prepare a heterometallic cyano-bridged complex by the reaction of GdCl3·nH2O,K2Ni(CN)4 and L (L=4-(2-hydroxyphenyl)-1,5,9-triazacyclododecan-2-one) in aqueous solution,and characterized by single-crystal X-ray diffraction.It crystallizes in monoclinic,space group P21/n with a=12.380(1),b=9.9637(8),c=17.087(1)A,β=105.947(2)°,V=2026.6(3) A3,Rint=0.0509,Z=2,Dc=1.297g/cm3,C34H56O8N10Ni,Mr=791.60,F(000)=844,μ(MoKα)=0.538 mm-1,S=1.030,the final R=0.0644 and wR=0.1299 for 2023 observed reflections with I≥2σ(I).The title compound 1 contains one anion of [Ni(CN)4]2-,two cations of [HL]+and four packing water molecules,which are held together by the N-H…O and O-H…O hydrogen bonds to form a three-dimensional framework. 相似文献
10.
1 INTRODUCTION In recent years, cyano-bridged heterometallic coordination compounds have inspired remarkable attention due to their rich and interesting structures and magnetic behaviors. However, these studies were mainly focused on the transition metals. Although several unusual cyanide bridging lanthanide-transition metal complexes have been re- ported[1~6], this field continuously possesses tre- mendous researching potentialities. As regardsPrussian Blue lanthanide complex, divers… 相似文献