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Valence angles, abnormal

Rule 8-Abnormal valence angles may be found if they increase HOMO-LUMO interactions between molecular fragments... [Pg.203]

The family of complexes of nucleophilic carbenes or alkylidenes is essentially composed with d complexes. For instance, the complexes [M(CH2t-Bu)3(=CHr-Bu)], M = Nb or Ta formally only have 10 valence electrons. The X-ray diffraction structures of Schrock s alkylidene complexes that have less than 18 valence electrons show that the M-C-H angle is weak and that the C-C-H angle is abnormally high, i.e. there is an agostic M=C-H bond that increases the NVE by two units ... [Pg.199]


See other pages where Valence angles, abnormal is mentioned: [Pg.244]    [Pg.244]    [Pg.245]    [Pg.244]    [Pg.244]    [Pg.245]    [Pg.239]    [Pg.317]    [Pg.484]    [Pg.142]   
See also in sourсe #XX -- [ Pg.228 ]




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