1998/07/01 by Anthony J. Arduengo, Fredric Davidson, R. Krafczyk +2 · 2 citations
Chemistry · #Adduct #Alkaline earth metal #Barium #Carbene #Catalysis #Chemistry #Coordination Chemistry and Organometallics #Crystallography #Inorganic chemistry #Magnesium #Medicinal chemistry #Metal #N-Heterocyclic Carbenes in Organic and Inorganic Chemistry #Organic chemistry #Organometallic Complex Synthesis and Catalysis #Strontium #Zinc
paper · doi:10.1021/om980438w
openalex publication_date 1998/07/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/22
The reactions and adducts of 1,3,4,5-tetramethylimidazol-2-ylidene with bis(pentamethylcyclopentadienyl)magnesium, -calcium, -strontium, -barium, or -zinc are described. A consistent tend in the spectroscopic properties and structures of the alkaline earth metallocenes is observed. The adduct between 1,3,4,5-tetramethylimidazol-2-ylidene and bis(pentamethylcyclopentadienyl)zinc shows a structure in which the zinc is only σ-bonded to the three ligating groups. Among the alkaline earth adducts, the σ-bonded interaction to the former carbene center of the 1,3,4,5-tetramethylimidazol-2-ylidene shows the shortest metal−carbon distances in each of the structures but the difference between the carbene−metal and pentamethylcyclopentadienyl−metal distances decreases as the atomic number of the metal increases.