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Bis cyclopentadienyl compound

The electronic structure of bis-cyclopentadienyl compounds is discussed in terms of molecular orbital theory. The way in which symmetry arguments may be used to facilitate such an analysis is described in some detail. [Pg.250]

Other Bis-cyclopentadienyl Compounds.—It is interesting to give similar accounts of other neutral molecules like ferrocene, where the central iron atom is replaced by Co, Ni, Cr or other atoms of the transition elements. The energy level diagram will not be veiy different from Fig. 11 in all these cases, and we may treat the molecules by adding, or subtracting the requisite number of electrons. [Pg.255]

Both metals form bis-cyclopentadienyl compounds and numerous substituted derivatives. None of these have anything approaching a ferrocene-like structure since the M2+ ions have closed d-shells. Cp2Zn is an infinite polymer while Cp2Cd is a monomer with tj -CsHs groups. [Pg.619]

It is becoming apparent that nonbonding interactions play a greater role than previously appreciated in determining the structures of both main-group and transition-metal metallocenes. Molecular mechanics are particularly efficient in describing such interactions and can be readily applied to much larger systems than traditional MO methods. The analysis of structural conformations of bis(cyclopentadienyl) compounds used in stereoselective synthesis can be expected to benefit from wider applications of MM methods. [Pg.162]

As expected, the Yb chemical shifts of bis(cyclopentadienyl) compounds are found in the low-frequency domain of the chemical shift range varying from —160 to +160. The base-free adducts are even more to lower frequency. [Pg.359]

Note that metallocene terminology (Section IR-10.2.6) is not recommended for bis(cyclopentadienyl) compounds of the main group metals (see Examples 6 and 7). [Pg.229]

Moffitt W (1954) The electronic structure of bis-cyclopentadienyl compounds. J Am Chem Soc 76 3386-3392... [Pg.56]


See other pages where Bis cyclopentadienyl compound is mentioned: [Pg.130]    [Pg.250]    [Pg.251]    [Pg.253]    [Pg.254]    [Pg.255]    [Pg.216]    [Pg.219]    [Pg.234]    [Pg.272]    [Pg.162]    [Pg.134]    [Pg.159]    [Pg.4276]    [Pg.5289]    [Pg.76]    [Pg.281]    [Pg.293]    [Pg.741]    [Pg.741]    [Pg.745]    [Pg.37]    [Pg.51]    [Pg.57]    [Pg.58]    [Pg.130]    [Pg.1000]    [Pg.4275]    [Pg.5288]    [Pg.5860]    [Pg.33]    [Pg.645]    [Pg.527]    [Pg.250]    [Pg.250]    [Pg.251]    [Pg.255]    [Pg.332]    [Pg.125]   
See also in sourсe #XX -- [ Pg.479 , Pg.480 ]




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