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Dimethylformamide adducts, structure

The structure of the dimethylformamide adduct of a chiral shift reagent based on 3-trifluoroacetyl-d-camphor has been determined (Cunningham and Sievers, 1975). This compound is a dimeric species, (facam)3Pr(DMF)3Pr(facam)3 in which the three DMF molecules serve as bridging groups. The two praseodymium atoms are nine-coordinate with the oxygen atoms occupying the vertices of a distorted monocapped square antiprism. This structure is particularly... [Pg.236]

First examples of second-sphere coordination adduct between a CD and such organometallic complexes were observed with the ferrocene and its derivatives. Thus, Breslow was the first to report in 1975 that ferrocene forms a 1 1 adduct with the /3-CD in both A/T-dimethylformamide and dimethyl sulfoxide. Nevertheless, the first crystalline inclusion complexes of ferrocene and its derivatives were prepared by Harada and Takahashi in 1984. The inclusion complexes were obtained by direct addition of crystals of ferrocene or its derivatives into aqueous solutions of CD. The stoichiometry of the inclusion complexes was found to be dependent on the sizes of the CD. The /3-CD and y-CD formed 1 1 stoichiometric inclusion complexes whereas a-CD formed a 2 1 (CD guest) complex with ferrocene. From induced circular dichroism experiments, three structures were proposed for these adducts as shown in Figure... [Pg.784]


See other pages where Dimethylformamide adducts, structure is mentioned: [Pg.655]    [Pg.93]    [Pg.352]    [Pg.2494]    [Pg.425]    [Pg.469]    [Pg.18]    [Pg.250]    [Pg.423]    [Pg.451]    [Pg.423]    [Pg.451]    [Pg.252]    [Pg.13]    [Pg.140]    [Pg.215]    [Pg.252]    [Pg.289]    [Pg.569]    [Pg.179]    [Pg.168]   
See also in sourсe #XX -- [ Pg.231 , Pg.236 ]




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Adducts structures

Dimethylformamide

Dimethylformamide structure

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