Department of Chemistry, University of Toronto, Toronto, ON, M5S 3H6, Canada.
Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, 92093-0343, USA.
Angew Chem Int Ed Engl. 2016 Apr 25;55(18):5536-40. doi: 10.1002/anie.201600765. Epub 2016 Mar 30.
The first carbodicarbene stabilized by flanking cyclopropenylidenes is reported. Tetraphenylcarbodicyclopropenylidene (2) is accessed by deprotonation of the corresponding triafulvene cyclopropenium salt, and has been spectroscopically characterized in [D8 ]THF solution at -60 °C. Main-group and transition-metal complexes of 2 have been accessed, and have revealed the high sigma donating ability, and exclusive η(1) binding of this neutral all carbon ligand. Variable temperature NMR spectroscopy studies reveal varying degrees of free rotation in the flanking cyclopropenylidene groups of 2 in its coordination compounds.
首例由两侧环丙烯基稳定的碳二亚胺被报道。四苯甲叉基环丙二烯（2）通过相应的三富烯环丙烯鎓盐的去质子化得到，并在-60°C 的 [D8]THF 溶液中通过光谱学进行了表征。2 的主族和过渡金属配合物已经被获得，并揭示了这种中性全碳配体的高sigma 给体能力和对 η(1)的专属性结合。变温 NMR 光谱研究表明，在其配位化合物中，2 的侧翼环丙烯基的自由旋转程度不同。
