Stereoselective C-alkylation of di-imine macrocycles: a versatile route to a series of meso-dialkyl-substituted macrocyclic tetramines
作者:Kim Henrick、Patricia M. Judd、Philip G. Owston、Roger Peters、Peter A. Tasker、Ralph W. Turner
DOI:10.1039/c39830001253
日期:——
Macrocycles containing two o-iminoanilino units undergo stereoselectiveC-alkylation on treatment with Grignard reagents or lithium alkyls to give the meso-dialkyl-substitutedmacrocyclic tetra-amines.
Macrocyclic ligand ring size effects. Part 1. Complexation of tetra-aza ligands containing fused dibenzo substituents with Zn II and Cd II : a solution stability, X-ray crystal structure, and molecular mechanics study
作者:Kenneth R. Adam、Brian J. McCool、Anthony J. Leong、Leonard F. Lindoy、Christopher W. G. Ansell、Philip J. Baillie、Keith P. Dancey、Laurel A. Drummond、Kim Henrick、Mary McPartlin、Dalgit K. Uppal、Peter A. Tasker
DOI:10.1039/dt9900003435
日期:——
The interaction of ZnII and CdII with an extensive series of dibenzo-substitutedmacrocyclic and open-chaintetra-amines has been investigated. All ligands form 1 : 1 (metal : ligand) complexes in solution with these metal ions; the thermodynamic stabilities of the complexes in 95% methanol (I= 0.1 mol dm–3, NEt4ClO4) have been determined. Along one series of 14- to 16-membered macrocyclic systems
Comparative study of the interaction of ‘lop-sided’ 14- to 17-membered tetraaza macrocycles containing fused dibenzo substituents with nickel(<scp>II</scp>)
作者:Ian M. Atkinson、Philip J. Baillie、Nick Choi、Luigi Fabbrizzi、Leonard F. Lindoy、Mary McPartlin、Peter A. Tasker
DOI:10.1039/dt9960003045
日期:——
macrocyclic donor plane along the series. The crystal structure of the 16-membered ring complex of nickel(II) nitrate is also reported, as is that of the 17-membered ring complex of nickel(II) chloride. The former contains an equal mixture of two (trans-octahedral) complexes of type [NiL(NO3)2] and [NiL(NO3)(H2O)]NO3. Cyclic voltammetry indicates that formation of the respective nickel(III) species is
研究了大环和螯合环的大小对一系列掺入14至17元内环的二苯并四氮杂大环的络合行为的影响。仅通过改变连接相邻苄基氮原子的亚甲基碳的数量,即可实现沿“偏侧%”系列的环大小变化。NiLX 2 · x H 2 O类型的几种固体配合物(L =大环配体;x = 0或1; X = Cl,NCS或NO 3)与这些环已被隔离。五个X射线晶体学分析的结果以及分子力学研究,使得可以比较环大小变化对X = NCS的14至17元环配合物的结构的影响。所有复合体都具有相似的六坐标反式-isothiocyanato几何形状,其中大环的四个供体占据了赤道平面。对于该系列,对于14至16元环配合物,镍原子周围的平面内键合长度与轴向键长之间呈反比关系。在17元物种的情况下,这种相关性不太明显。X射线和分子力学研究表明,随着连接相邻苄氨基氮的亚甲基碳原子数的增加,金属上相应的咬合角增加,相反的咬合角以(部分)补偿的方式降低。结
Complexation of lop-sided 16- and 17-membered tetraaza macrocycles containing fused dibenzo substituents with zinc(II) and cadmium(II)
作者:Philip J. Baillie、Nick Choi、Leonard F. Lindoy、Mary McPartlin、Harold R. Powell、Peter A. Tasker
DOI:10.1039/dt9960003039
日期:——
their zinc(II) and cadmium(II) complexes have been prepared and characterized. Crystal structures of both new macrocycles and of their respective cadmium(II) complexes have been determined. The 16-membered macrocycle yields a pseudo-square-pyramidal cadmium(II) complex whereas the 17-membered one forms a distorted-octahedral complex. Comparison of these structures with those for the cadmium(II) complexes