Mononuclear and homobinuclear lead(II) complexes of macrocyclic Schiff bases
作者:Diana H. Cook、David E. Fenton、Michael G. B. Drew、Alex Rodgers、Malachy McCann、S. Martin Nelson
DOI:10.1039/dt9790000414
日期:——
polyfunctional diprimary amines to yield complexes of macrocyclic Schiff-base ligands in moderate to good yield. Three types of macrocyclic lead(II) complex are described: (i) mononuclear complexes of 15- and 17-membered quinquedentate N5 and N3S2 ligands; (ii) mononuclear complexes of 18-membered sexidentate N3O3, and N2O4 ligands; and (iii) binuclear complexes of a 30-rnembered decadentate N6O4 ligand
铅(II)盐充当几种有机二羰基化合物与各种多官能二伯胺的环状缩合的模板,以中等至良好的产率生成大环Schiff碱配体的配合物。描述了三种类型的大环铅(II)配合物:(i)15和17元五齿N 5和N 3 S 2配体的单核配合物;(ii)18元性别相同的N 3 O 3和N 2 O 4配体的单核络合物;和(iii)30核腐朽的N 6的双核络合物O 4配体。借助于固体的红外光谱和溶液上的电导率测量,并参考选定配合物的X射线结构测定,在可能的情况下分配配位几何形状。铅(II)离子的配位数在五到八之间变化,取决于存在的阴离子的性质以及大环的性质。某些大环的碱土金属络合物与溶液中的Pb II发生交换反应;注意到这些反应在铅中毒螯合治疗中的可能应用。
Synthesis of nitrogen and sulfur macrocycles with cis exogenous oxygen and sulfur donor atoms
作者:Vivienne A. White、Nicholas J. Long、Neil Robertson
DOI:10.1039/b510734b
日期:——
2 + 2 cyclisation reactions with exogenous-O2 or S2 respectively. Alkylation of preformed exogenous-O2 macrocycles was explored and led to alkyl substitution at the secondary amine nitrogens in the ring, however synthesis of these species was overall lower yielding than cyclisation using alkylated tetraamine precursors. Thionation of an exo-O2 macrocycle using an analogue of Lawesson's Reagent led to
Synthesis and co-ordination chemistry of new Schiff-base bis(crown ether) ligands containing recognition sites for alkali- and transition-metal guest cations. Crystal structure of a copper(<scp>I</scp>)–potassium complex
作者:Paul D. Beer、Christopher G. Crane、Michael G. B. Drew
DOI:10.1039/dt9910003235
日期:——
Schiff-base bis(crownether) ligands L1–L5 containingrecognitionsites for alkali- and transition-metal guestcations have been prepared by the condensation of two equivalents of 15-formyl-2,3,5,6,8,9,11,12-octahydro-1,4,7,10,13-benzopentaoxacyclopentadecine with diamines H2NXNH2(X =[CH2]2S[CH2]2, [CH2]2S[CH2]2S[CH2]2, [CH2]2S[CH2]3S[CH2]2, [CH2]3S[CH2]2S[CH2]3 or [CH2]2NH[CH2]2). The sodium cation forms
通过缩合两个当量的15-甲酰基-2,3,5,6,8,制备了新的席夫碱双(冠醚)配体L 1 -L 5,其中包含碱金属和过渡金属客体阳离子的识别位点与二胺H 2 NXNH 2(X = [CH 2 ] 2 S [CH 2 ] 2,[CH 2 ] 2 S [CH 2 ] 2 S [CH 2 ] 2,[CH 2 ] 2 S [CH 2 ] 3 S [CH 2 ]2,[CH 2 ] 3 S [CH 2 ] 2 S [CH 2 ] 3或[CH 2 ] 2 NH [CH 2 ] 2)。钠阳离子形成2:1 Na +:L络合物,而较大的钾阳离子与这些配体产生1:1分子内夹心复合物。还分离了均金属铜( I)络合物和杂多金属铜( I)-钠和-钾络合物。已经确定了一种铜-钾配合物的单晶X射线结构。Heteropolymetallic银(我也已制备了钠和钾配体。碳13 NMR滴定研究表明,席夫碱双(冠醚)配体对钾客体
The synthesis, properties, and the crystal and molecular structures of five-co-ordinate copper(<scp>I</scp>) and silver(<scp>I</scp>) complexes of a quinquedentate macrocyclic ligand having an ‘N<sub>3</sub>S<sub>2</sub>’ donor set
作者:Michael G. B. Drew、Colin Cairns、Stephen G. McFall、S. Martin Nelson
DOI:10.1039/dt9800002020
日期:——
17-membered macrocyclic ligand L1 containing the ‘N3S2’ donor set has been synthesised [and isolated as the silver(I) complex] by the template action of silver(I) salts on the cyclic Schiff-base condensation of 2,6-diacetyl-pyridine with 1,10-diamine-4,7-dithiadecane. The copper(II) ion was ineffective as a template for the synthesis. However, copper(II) complexes of L1 could be obtained from [AgL1]+via metal
含有'N 3 S 2 '供体组的17元大环配体L 1已通过银(I)盐对环的席夫碱缩合反应的模板作用合成[并分离为银(I)配合物] 。 2,6-二乙酰基吡啶与1,10-二胺-4,7-二硫杂癸烷。铜(II)离子是无效的作为用于合成的模板。然而,L 1的铜(II)配合物可以通过金属交换(金属转移)从[AgL 1 ] +中获得。四苯基硼酸钠是[Cu II L 1 ] 2+的还原剂,以高收率获得[Cu I L 1 ] +。讨论了减少[BPh 4 ] -的可能机制。使用Na [BH 4 ]氢化[AgL 1 ] +盐可得到游离的还原大环RL 1(即L 1 + 4H),从中可得到新范围的大环配合物。报道了L 1的银(I)和铜(I)配合物的红外和电子光谱。铜(I)配合物对O 2和CO均不反应。[CuL 1的晶体] [ClO 4 ]是正交的,a = 6.844(7),b = 12.361(11),c = 24
A new method to extend dimercaptan or diamine chains with aminopropyl units using 3-bromo-N-tritylpropanamine
作者:Krzysztof E. Krakowiak、Peter Huszthy、Jerald S. Bradshaw、Reed M. Izatt
DOI:10.1016/s0040-4039(00)71207-x
日期:1991.1
Dimercaptans and diamines react with 3-bromo-N-tritylpropanamine to give the corresponding N,N'-ditrityldithia and N,N'-ditritylpolyaza compounds in yields of 50-80%. The trityl protecting groups are readily removed in acid. These reactions make possible the synthesis of a number of new alpha-omega-diamino compounds needed for the synthesis of new dithiadiaza, di- and polyaza macrocyclic ligands.