<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "Substitution reactions at tetracoordinate boron: Synthesis of N-heterocyclic carbene boranes with boron-heteroatom bonds"^^ . "Boryl halide, carboxylate and sulfonate complexes of 1,3-bis(2,6- diisopropylphenyl)imidazol-2-ylidene (dipp-Imd-BH2X, X = halide or sulfonate) have been prepared from the parent borane dipp-Imd-BH3 by (1) substitution reactions with R-X (X = halide or sulfonate), (2) reactions with electrophiles (like I2 or NIS), or (3) acid/base reactions with HX (provided that HX has a pKa of about 2 or less). Dipp-Imd-BH 2I is most conveniently prepared by reaction with diiodine while dipp-Imd-BH2OTf is best prepared by reaction with triflic acid. These and other less reactive complexes behave as electrophiles and can be substituted by a wide range of heteroatom nucleophiles including halides, thiolates and other sulfur-based nucleophiles, isocyanate, azide, nitrite, and cyanide. The resulting products are remarkably stable, and many have been characterized by X-ray crystallography. Several are members of very rare classes of functionalized boron compounds (boron azide, nitro compound, nitrous ester, etc.). © 2010 American Chemical Society."^^ . "2010-10-27" . . "132" . "42" . . "Journal of the American Chemical Society"^^ . . . "00027863" . . . . . . . . . . . . . . . . . . . . . . . . . "DP"^^ . "Curran"^^ . "DP Curran"^^ . . "SJ"^^ . "Geib"^^ . "SJ Geib"^^ . . "Q"^^ . "Chu"^^ . "Q Chu"^^ . . "L"^^ . "Fensterbank"^^ . "L Fensterbank"^^ . . "E"^^ . "Lacôte"^^ . "E Lacôte"^^ . . "M"^^ . "Malacria"^^ . "M Malacria"^^ . . "A"^^ . "Solovyev"^^ . "A Solovyev"^^ . . . . . . "Substitution reactions at tetracoordinate boron: Synthesis of N-heterocyclic carbene boranes with boron-heteroatom bonds (Plain Text)"^^ . . . "licence.txt"^^ . . . "Substitution reactions at tetracoordinate boron: Synthesis of N-heterocyclic carbene boranes with boron-heteroatom bonds (Other)"^^ . . . . . . "indexcodes.txt"^^ . . "HTML Summary of #17258 \n\nSubstitution reactions at tetracoordinate boron: Synthesis of N-heterocyclic carbene boranes with boron-heteroatom bonds\n\n" . "text/html" . .