“…[20,29,30] For instance, Bégué and Wentrup have theo-retically investigated different amino-, hydroxy-, and fluorosubstituted nitrile imines (R-CNN-H, H-CNN-R, and R-CNN-R; R = NH 2 , OH, and F) and predicted that some of the studied molecules should exhibit carbenic character. [24] Therefore, the question still remains as to whether nitrile imines of predominantly carbenic type can be generated and characterized. Instead, moderate IR intensities below 2000 cm -1 are expected for carbenic nitrile imines.…”