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Carbene radicals, in which the carbene is bonded to an open-shell metal with the carbene carbon possessing a radical character. Carbene radicals have features of both Fischer and Schrock carbenes, but are typically long-lived reaction intermediates. The "second generation" of the Grubbs catalysts for alkene metathesis features an NHC ligand.
Carbyne molecules are generally found to be in electronic doublet states: the non-bonding electrons on carbon are arranged as one radical (unpaired electron) and one electron pair, leaving a vacant atomic orbital, rather than being a triradical (the quartet state).
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Examples include (CO) 5 W=COMePh and (OC) 5 Cr=C(NR 2)Ph. Orbital interaction in a Fisher carbene. The carbene electrons are donated to a sigma bond, and weak pi-backbonding occurs. Fisher carbene complexes are related to the singlet form of carbenes, where both electrons occupy the same sp 2 orbital at the carbon. This lone pair donates to a ...
The Wheel of Fortune from Carmina Burana. Carmina Burana (/ ˈ k ɑːr m ɪ n ə b ʊ ˈ r ɑː n ə /, Latin for "Songs from Benediktbeuern" [Buria in Latin]) is a manuscript of 254 [1] poems and dramatic texts mostly from the 11th or 12th century, although some are from the 13th century.
Download as PDF; Printable version; In other projects ... incidental music to Salammb ... "Whaling Stories" on Procol Harum ...
Methylene (IUPAC name: Methylidene, also called carbene or methene) is an organic compound with the chemical formula CH 2 (also written [CH 2] and not to be confused with compressed hydrogen, which is also denoted CH 2). It is a colourless gas that fluoresces in the mid-infrared range, and only persists in dilution, or as an adduct.