Bismuth imide

Scheme 3 shows the conceivable reaction sites of alkenylbismuthonium salts, alkynylbismuthonium salts, bismuth ylides, and bismuth imides in carbon-carbon and carbon-heteroatom bond forming reactions. In the initial step, nucleophiles (Nu) attack the positively charged bismuth(V) center, a-proton or (3-carbon (Scheme 3a, b) whereas electrophiles (El) attack the negatively charged a-carbon or a-nitrogen (Scheme 3c, d). Usually, the resulting bismuth(V) intermediates... 

Scheme 3 Reaction sites of organobismuth(V) reagents in C-C and C-X bond forming reactions (a) alkenylbismuthonium salt (b) alkynylbismuthonium salt (c) bismuth ylide (d) bismuth imide. Nu nucleophile, B base, El electrophile...

The ylides and imides are present as monomers, and the bismuth center adopts a distorted tetrahedral geometry. In contrast, the structural properties of the bismuth oxides vary widely depending on the aryl ligands attached to the bismuth center the oxides exist as hydrates, dimers, or polymers in solution and in the solid state. X-ray structural analysis of an oxide dimer revealed that the bismuth center has a distorted, trigonal bipyramidal geometry with the two oxygen atoms at the apical and equatorial positions [47, 48]. 

The majority of amides (or imides) of arsenic, antimony and bismuth (collectively designated as of M ), have M in the - -3 oxidation state, although several examples of As and Sb amides or imides have been reported but only three papers have dealt with Bi compounds. The imides considered to be within the scope of this chapter are those having trivalent nitrogen as, for instance, in [As(p-NR)X]2. There are very few examples of As —N compounds, such as the bis(imido)arsenic(I) cation 1," and only one of a thermally stable... 

Rasmussen et al. [205] described the use of resin-bound triaryl bismuth diacetates as starting material for O, N and C arylations [206]. In their approach one of the non-polymer-bound aryl groups is transferred onto imides, amides, carbamates, imidazoles, ahphatic amines, anilines, and phenols to yield the corresponding N- and O-arylated compounds. In the case of p-naphthol the a-C-arylated naph-thol was obtained in 49-68% yield. The authors used 1.5 equiv. of P-naphthol, and... 

Bis(4-methylphenyl)bismuth A -(4-methylphenyl)sulfonylamide 4 is obtained in moderate yield by the reaction of tris(4-methylphenyl)bismuth [A -(4-methylphenyl)sulfonyl]imide with anise alcohol or cinnamyl alcohol [96JCR(S)24]. This amide is insoluble in benzene, but soluble in chloroform, and not so sensitive to oxygen md moisture in the solid state. However, it slowly decomposes to tris(4-methylphenyl)bismuthine and a white powdery deposit when the amide is stood in CDCI3. 

Polyamide-imide resin plastics, reinforced Dipropylene glycol Polypropylene plastics, surface-coating Bismuth subsalicylate plastics, vinyl Ammonium acetate plastisols... 

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