... Tetrahedron. Volume 43, Issue 4, 1987, Pages 653–662. Cover image Cover image. Reaction of difluorocarbene with small bicyclic molecules. ... Tetrahedron Lett., 23 (1982), p. 2323. 8; MJS Dewar, W. Thiel; J. Am. ... 17; Estimated from ΔH f of 1,4-pentadiene and group equivalents. 12 ...