Roger W. Alder, Michael E. Blake, Christel Bortolotti, Simone Bufali, Craig P. Butts, Emma Linehan, Josep M. Oliva, A. Guy Orpen and Michael J. Quayle
Stable diaminocarbenes, including imidazol-2-ylidenes, undergo complexation with lithium, sodium and potassium species; the crystal structure of a complex of 1,3-diisopropyl-3,4,5,6-tetrahydropyrimid-2-ylidene 1 with KN(SiMe3)2 is reported.