Dynamic behavior of anionic binuclear helicate- and meso-helicate-type coordination compounds

被引:30
作者
Albrecht, M
Schneider, M
Rottele, H
机构
[1] Institut für Organische Chemie, Universität Karlsruhe, D-76131 Karlsruhe, Richard-Willstätter-Allee
来源
CHEMISCHE BERICHTE-RECUEIL | 1997年 / 130卷 / 05期
关键词
self-assembly; NMR spectroscopy; titanium; catechol ligands; helical structures;
D O I
10.1002/cber.19971300512
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The racemization/symmetrization of helicate- or meso-helicate-type dinuclear titanium(IV) complexes M-n[(ligand)(3)Ti-2] (n = 4: M = Li, Na, K, Cs; n = 2: M = Ca, Sr), which are formed by metal-directed self-assembly of alkyl-bridged bis(catecholate) ligands in the presence of basic alkali-metal or alkaline-earth metal salts, can be monitored by dynamic NMR spectroscopy. The free-energy barrier (Delta G(not equal)) of this process is influenced by the nature of the ligand, the solvent, and the counterion.
引用
收藏
页码:615 / 619
页数:5
相关论文
共 32 条
  • [11] Interlocked and intertwined structures and superstructures
    Amabilino, DB
    Stoddart, JF
    [J]. CHEMICAL REVIEWS, 1995, 95 (08) : 2725 - 2828
  • [12] [Anonymous], 1995, METALS LIGAND REACTI
  • [13] CONSTABLE EC, 1994, CHEM IND-LONDON, P56
  • [14] SYNTHESIS AND X-RAY STRUCTURE OF A NOVEL CHIRAL TRINUCLEAR TITANIUM-TETRAOL COMPLEX
    COREY, EJ
    CYWIN, CL
    NOE, MC
    [J]. TETRAHEDRON LETTERS, 1994, 35 (01) : 69 - 72
  • [15] Enemark E. J., 1995, ANGEW CHEM, V107, P1082
  • [16] SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF A STEREOSPECIFIC DINUCLEAR GALLIUM TRIPLE-HELIX - USE OF THE TRANSINFLUENCE IN METAL-ASSISTED SELF-ASSEMBLY
    ENEMARK, EJ
    STACK, TDP
    [J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1995, 34 (09): : 996 - 998
  • [17] FAY RC, 1983, J AM CHEM SOC, V105, P2118, DOI 10.1021/ja00346a004
  • [18] HESSE M, 1984, SPEKTROSKOPISCHE MET
  • [19] Dinuclear catecholate helicates: Their inversion mechanism
    Kersting, B
    Meyer, M
    Powers, RE
    Raymond, KN
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (30) : 7221 - 7222
  • [20] Gallium(III) catecholate complexes as probes for the kinetics and mechanism of inversion and isomerization of siderophore complexes
    Kersting, B
    Telford, JR
    Meyer, M
    Raymond, KN
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1996, 118 (24) : 5712 - 5721