描述了由1,2-二亚甲基环庚烷()合成8,ll-二卤代[5]甲基环已烷(卤素=氯或溴)。随温度变化的1 H NMR光谱的自旋饱和转移和线形分析表明,它们以两种构型A(85-89%)和B(分别为15-11%)发生。尽管碳价键的严重变形,但仍遵守Karplus关系的邻子质子偶合常数对五亚甲基桥的构型进行了充分分析。确定了构象体A和B之间平衡的基态和过渡态的热力学参数,并根据这些高度应变的分子中的空间相互作用进行了讨论。
Aromaticity of highly bent benzene rings. An investigation by high-field deuterium NMR of [5]metacyclophane and model compounds
作者:P. C. M. Van Zijl、L. W. Jenneskens、E. W. Bastiaan、C. MacLean、W. H. De Wolf、Friedrich. Bickelhaupt
DOI:10.1021/ja00267a009
日期:1986.4
JENNESKENS, LEONARDUS W.;DE, BOER HENRICUS J. R.;DE, WOLF WILLEM H.;BICKE+, J. AMER. CHEM. SOC., 112,(1990) N4, C. 8941-8949
作者:JENNESKENS, LEONARDUS W.、DE, BOER HENRICUS J. R.、DE, WOLF WILLEM H.、BICKE+
DOI:——
日期:——
JENNESKENS, L. W.;DE, KANTER, F. J. J.;TURKENBURG, L. A. M.;DE, BOER, H. +, TETRAHEDRON, 1984, 40, N 21, 4401-4413
作者:JENNESKENS, L. W.、DE, KANTER, F. J. J.、TURKENBURG, L. A. M.、DE, BOER, H. +
DOI:——
日期:——
Reactivity of 8,11-dihalo[5]metacyclophanes
作者:Leonardus W. Jenneskens、Henricus J. R. De Boer、Willem H. De Wolf、Friedrich Bickelhaupt
DOI:10.1021/ja00180a045
日期:1990.11
metacyclophanes revealed a rather unusual reactivity pattern. Compared to normal, planar aromatic analogues, the cyclophanes showed two remarkable trends: (1) for typical aromatic reactions (acid-catalyzed or photochemicalrearrangement, reductions, Diels-Alder reactions), a strong rate enhancement was observed; (2) toward organolithium reagents, abnormal reaction pathways are followed, such as nucleophilic substitution
Synthesis and conformational analysis of 68,11-dihalo[5]metacyclophanes
作者:Leonardos W. Jenneskens、Franciscus J.J. De Kanter、Lucas A.M. Turkenburg、Henricus J.R. De Boer、Willem H. De Wolf、Friedrich Bickelhaupt
DOI:10.1016/s0040-4020(01)98816-7
日期:——
The synthesis of the 8,ll-dihalo[5]metacyclophanes (halogen = chlorine or bromine) from 1,2-dimethylenecycloheptane () is described. Spin saturation transfer and line shape analysis of the temperature dependent 1H NMR spectra showed to occur in two conformations A (85-89%) and B (15-11%, respectively). The conformation of the pentamethylene bridge was fully analyzed from vicinal proton coupling constants
描述了由1,2-二亚甲基环庚烷()合成8,ll-二卤代[5]甲基环已烷(卤素=氯或溴)。随温度变化的1 H NMR光谱的自旋饱和转移和线形分析表明,它们以两种构型A(85-89%)和B(分别为15-11%)发生。尽管碳价键的严重变形,但仍遵守Karplus关系的邻子质子偶合常数对五亚甲基桥的构型进行了充分分析。确定了构象体A和B之间平衡的基态和过渡态的热力学参数,并根据这些高度应变的分子中的空间相互作用进行了讨论。