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Chromium complex compounds cations

The chromium(IIl) compound contains a central tridentate oxide ligand (Fig. 2), an arrangement which is typical of other oxo-centred derivatives of chromium(III), such as the carboxylato and sulfato complexes. In the diethylcarbamato derivative, the central oxide ligand deviates by only 0.07 A from the plane of the three chromium atoms. It should be noted that the chromium derivative still retains a chloride ligand in its coordination as the starting material is anhydrous CrCl3, this corresponds to incomplete removal of chloride from the kinetically inert 3d chromium(III) cation. [Pg.306]

It is well known that the tricarbonylchromium-complexed benzylic anions and cations are stabilized due to overlapping between d-orbital of the chromium and p-orbital of the benzylic carbon [1]. Tricarbonylchromium complexes of a-te-tralone and a-indanone having a carbonyl group at the side chain underwent a deprotonation of the exo-benzylic protons by treatment with base to give the stereo-controlled tricyclic compounds (Eqs. 1 and 2) [2]. In these cases, Robinson annulation products were formed in less than 10% yield. Also, base treatment of benzyl ether chromium complex having a chlorine at the side chain 3 gave cyclization product as a diastereomeric mixture (Eq. 3) [3]. [Pg.130]


See other pages where Chromium complex compounds cations is mentioned: [Pg.229]    [Pg.502]    [Pg.393]    [Pg.181]    [Pg.250]    [Pg.268]    [Pg.341]    [Pg.718]    [Pg.320]    [Pg.223]    [Pg.14]    [Pg.269]    [Pg.144]    [Pg.254]    [Pg.502]    [Pg.783]    [Pg.107]    [Pg.1068]    [Pg.221]    [Pg.502]    [Pg.782]    [Pg.267]    [Pg.2557]    [Pg.104]    [Pg.70]    [Pg.277]    [Pg.293]    [Pg.796]    [Pg.70]    [Pg.299]    [Pg.380]    [Pg.240]    [Pg.94]    [Pg.50]   
See also in sourсe #XX -- [ Pg.2 , Pg.3 , Pg.5 , Pg.6 , Pg.132 , Pg.133 , Pg.136 ]




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Chromium complex compounds

Chromium complex compounds cations, with

Chromium complexes, cations

Chromium compounds

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