Intramolecular Methylacridan-Methylacridinium Complexes with a Phenanthrene-4,5-diyl or Related Skeleton: Geometry-Property Relationships in Isolable CH Bridged Carbocations
作者:Takanori Suzuki、Yasuyo Yoshimoto、Takashi Takeda、Hidetoshi Kawai、Kenshu Fujiwara
DOI:10.1002/chem.200801769
日期:2009.2.16
Bridging the gap: Snapshots of 1,6‐H‐shift precursors indicate that a narrower CH⋅⋅⋅C+ separation (D in the ORTEP diagram) in the title complexes induces faster degenerate rearrangement of 1+. A contact distance of less than 2.7 Å is necessary to realize the organic three‐center two‐electron bond of [CHC]+, as indicated by extrapolation of the X‐ray data.
桥接间隙:1,6-H-移的快照前体表明较窄Ç H⋅⋅⋅C +分离(d在ORTEP图)中的标题配合物诱导的更快的退化重排1 +。小于2.7埃的接触距离是必须实现的有机三中心两电子键[C ħ C] +,由X射线数据的外推法所指示的。