Unusual C-H small middle dot small middle dot small middle dotSe=C Interactions in Aldols of Chiral N-Acyl Selones Detected by Gradient-Selected (1)H-(77)Se HMQC NMR Spectroscopy and X-ray Crystallography This work was supported by the Los Alamos National Laboratory Directed Research and Development Fund (grant XAB2). We thank Dr. Judith Gallucci (Department of Chemistry, Ohio State University) for obtaining the X-ray structures of 1 and 3, and Dr. Charles Campana (Bruker Analytical X-ray Systems in Madison, WI) for obtaining the X-ray structure of 2
Angew Chem Int Ed Engl. 2000 Sep 1;39(17):3067-3070.