作者:Anurag Noonikara-Poyil、Shawn G. Ridlen、H. V. Rasika Dias
DOI:10.1021/acs.inorgchem.0c02886
日期:2020.12.21
Treatment of bis(pyrazolyl)borate ligand supported [(CF3)2Bp]Cu(NCMe) with 1,2,3-trisubstituted cyclopropenes produced thermally stable copper(I) η2-cyclopropene complexes amenable to detailed solution and solid-state analysis. The [(CF3)2Bp]Cu(NCMe) also catalyzed [2 + 1]-cycloaddition chemistry of terminal and internal alkynes with ethyl diazoacetate affording cyclopropenes, including those used
Vibrational structure in the photoelectron spectrum of cyclobutadiene as a probe of structure
作者:Daniel W. Kohn、Peter Chen
DOI:10.1021/ja00060a035
日期:1993.4
The photoelectron spectrum of cyclobutadiene, c-C[sub 4]H[sub 4], is reported with partial resolution of vibrationalstructure. Model calculations of the Franck-Condon envelope in the spectrum, based on ab initio geometries and force constants for c-C[sub 4]H[sub 4][sup [center dot]+], find a surprisingly good agreement for a transition from the rectangular neutral to a rectangular, as opposed to a