使用锂和钾金属还原了几种退火的邻苯二环戊二烯衍生物。研究发现,去核作用通过改变电荷分布而影响香兰素的环戊烯特性。与六元环退火的衍生物的二价阴离子比corannulene二价阴离子具有更少的年环特性和更少的顺性。这种作用在周围的Corannulenes中更加明显。-与五元环退火。还原过程中使用的碱金属对结果有很大影响,特别是对还原度有很大影响。大多数衍生物仅通过钾而不是锂被还原为四阴离子,例外的是可以通过特殊方式(例如聚集或二聚)稳定四价阴离子的体系。一个这样的系统是环戊四烯[ bc ] corannulene(acecorannulylene),它给出一个配位二聚体,该二聚体由两个环戊四烯环戊四阴离子通过锂阳离子以凸-凸的方式结合在一起。在该二聚体中的接触点是来自每个环戊四烯环烯单元的两个再杂化的碳,它们被两个锂阳离子桥接在一起。
Isocorannulenofuran: A Versatile Building Block for the Synthesis of Large Buckybowls
摘要:
Isocorannulenofuran, synthesized in two steps from accessible bromocorannulene, gives Diels-Alder adducts with benzynes which can be deoxygenated to produce large polycyclic aromatic hydrocarbons (PAHs) combining the bowl-shaped corannulene subunit with planar fragments.
Fusing a Planar Group to a π‐Bowl: Electronic and Molecular Structure, Aromaticity and Solid‐State Packing of Naphthocorannulene and its Anions
作者:Zheng Zhou、Sarah N. Spisak、Qi Xu、Andrey Yu. Rogachev、Zheng Wei、Massimo Marcaccio、Marina A. Petrukhina
DOI:10.1002/chem.201705814
日期:2018.3.7
with Group 1 metals and isolated as sodium and rubidium salts. Their X‐ray diffraction study revealed the formation of “naked” mono‐ and dianions crystallized as solvent‐separated ion products with one or two sodium cations as [Na+(18‐crown‐6)(THF)2][C28H14−] and [Na+(18‐crown‐6)(THF)2]2[C28H142−] (3⋅THF and 4⋅THF, respectively). The dianion of 1 was also isolated as a contact‐ion complex with two rubidium
Isocorannulenofuran: A Versatile Building Block for the Synthesis of Large Buckybowls
作者:Andrzej Sygula、Renata Sygula、Peter W. Rabideau
DOI:10.1021/ol0625839
日期:2006.12.1
Isocorannulenofuran, synthesized in two steps from accessible bromocorannulene, gives Diels-Alder adducts with benzynes which can be deoxygenated to produce large polycyclic aromatic hydrocarbons (PAHs) combining the bowl-shaped corannulene subunit with planar fragments.
Reduction of Bowl-Shaped Hydrocarbons: Dianions and Tetraanions of Annelated Corannulenes
作者:Ivan Aprahamian、Dorin V. Preda、Mihail Bancu、Anthony P. Belanger、Tuvia Sheradsky、Lawrence T. Scott、Mordecai Rabinovitz
DOI:10.1021/jo051949c
日期:2006.1.1
with lithium, the exception being systems that can stabilize the tetraanion with lithium by special means, such as aggregation or dimerization. One such system is cyclopenta[bc]corannulene (acecorannulylene), which gives a coordinativedimer that consists of two cyclopentacorannulene tetraanions, bound together in a convex−convex fashion by lithium cations. The points of contact in this dimer are two
使用锂和钾金属还原了几种退火的邻苯二环戊二烯衍生物。研究发现,去核作用通过改变电荷分布而影响香兰素的环戊烯特性。与六元环退火的衍生物的二价阴离子比corannulene二价阴离子具有更少的年环特性和更少的顺性。这种作用在周围的Corannulenes中更加明显。-与五元环退火。还原过程中使用的碱金属对结果有很大影响,特别是对还原度有很大影响。大多数衍生物仅通过钾而不是锂被还原为四阴离子,例外的是可以通过特殊方式(例如聚集或二聚)稳定四价阴离子的体系。一个这样的系统是环戊四烯[ bc ] corannulene(acecorannulylene),它给出一个配位二聚体,该二聚体由两个环戊四烯环戊四阴离子通过锂阳离子以凸-凸的方式结合在一起。在该二聚体中的接触点是来自每个环戊四烯环烯单元的两个再杂化的碳,它们被两个锂阳离子桥接在一起。