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Metal-carbon bond distances

TABLE 2.8. Adsorption Geometries of Benzene, Indicating Average Carbon-Ring Radius, C-C Bond Lengths (Two Values Where Long and Short Bonds Coexist), Metal-Carbon Distances, and Adsorption Sites of C H Ring Centers... [Pg.269]

The TT-backbonding in alkylidene and alkylidyne complexes is evidenced by considerably shorter M —C distances compared to the metal-carbon distances in compounds containing crM —C bonds. The metal-carbon distances in compounds containing M —C single bonds are usually ca20pm longer than the metal-carbene carbon distances and even up to 40 pm longer compared to the metal-carbyne carbon distances. [Pg.281]

An interesting example of t 3 coordination of a boratabenzene to a transition metal has been observed for a Zr(IV)-boratanaphthalene complex (Scheme 20).35 Thus, treatment of the illustrated 1-boratanaphthalene with Cp+ZrCl3 furnishes an adduct in which the metal-carbon distance for the 3, 4, and 5 positions of the heterocycle (2.53-2.56 A) is significantly shorter than for the 2 and 6 positions (2.77-2.81 A). It is suggested that this distorted bonding mode is the consequence of the high electron demand of Zr(IV), which prefers coordination to the most electron-rich carbon atoms. ... [Pg.111]

The osmium-carbyne carbon bond lengths for the three complexes do not differ significantly, and reference to Table IV indicates that these distances are distinctly shorter than the characterized metal-carbon double bonds of osmium carbene and carbonyl complexes. In both osmium alkylidene and carbyne complexes, then, the metal-carbon multiple bond lengths are largely insensitive to changes in the metal electron density (cf. Section IV,B). [Pg.188]

Crystal structure data15 indicate that in the vast majority of (cyclobutadiene)metal complexes (4) the cyclobutadiene ligand is approximately square-planar with nearly equal C—C bond distances (ca 1.46 A) and bond angles of ca 90°. Within a given complex the cyclobutadiene carbon-to-metal distances are roughly equal. [Pg.890]

In agreement with the presence of an additional electron in the bonding orbital, compared to vanadocene (chromocene 16 valence electrons, terminal electronic configuration e a ), the metal-carbon distance is shorter (2.15 A compared to 2.27 A of vanadocene). [Pg.206]


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Bond distances

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Bonds carbon-metal bond

Carbon distance, metal

Metal distance

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