Carbenes, Carbynes, and Carbidos

An sf) -hybrid orbital on the C atom donates a pair of electrons to an empty orbital on the metal, while the unhybridized p-orbital on the C accepts electron density in a r-backbonding arrangement from a filled d-orbital on the metal. Fischer-type 

Example of an organometallic compound having a W-C single, double, and triple bond in the same molecule. 

For each of the following organometallics that obey the 18-electron rule, determine the identity of the first-row metal M (unless otherwise specified)  

For each of the following organometallic compounds, determine the formal oxidation state of the metal, the d count, the total number of valence electrons in the compound, and whether the metal is saturated or unsaturated  

Sketch the one-electron MO diagram for the tetrahedral Ni(CO)4 organometallic compound. Label each MO with its proper group theoretical symbol and fill in the correct number of valence electrons. Also, determine the number of v(CO) stretches in the IR spectrum. 

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