Jump to main content
Jump to site search

Issue 7, 2003
Previous Article Next Article

Arsacarborane chemistry. The 7,8,9,11-, 7,9,8,10- and 7,8,9,10-isomers of nido-As2C2B7H9 and some of their halogenated derivatives

Author affiliations

Abstract

The reaction between arachno-4,6-C2B7H13 (1) and AsCl3 or AsI3 in CH2Cl2 in the presence of PS (PS = “proton sponge”, 1,8-bis(dimethylamino)naphthalene) resulted in the isolation of the parent, isomeric eleven-vertex nido diarsadicarbaboranes 7,8,9,11-As2C2B7H9 (2) and 7,9,8,10-As2C2B7H9 (3). Isolated were also halogenated derivatives of 2, 3-Cl-7,8,9,11-As2C2B7H8 (3-Cl-2) and 3-I-7,8,9,11-As2C2B7H8 (3-I-2). The presence of Et3N·BH3 in the reaction mixture increased the yield of unsubstituted compounds and suppressed the formation of halogenated species. The reaction between the isomeric carborane arachno-4,5-C2B7H13 (4) and AsCl3 in CH2Cl2 in the presence of PS gave another isomer, nido-7,8,9,10-As2C2B7H9 (5), which was accompanied by small amounts of its chloroderivative 3-Cl-7,8,9,10-As2C2B7H8 (3-Cl-5) and compound 3. The structure of the iodinated derivative 3-I-2 was determined by an X-ray diffraction analysis. Moreover, the structures of all parent compounds and chloroderivatives, inclusive of that of the still missing nido-7,10,8,9-As2C2B7H9 (6) isomer, were geometry-optimised at the DFT-B3LYP/6-31G* level.

Graphical abstract: Arsacarborane chemistry. The 7,8,9,11-, 7,9,8,10- and 7,8,9,10-isomers of nido-As2C2B7H9 and some of their halogenated derivatives

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Dec 2002, accepted on 20 Feb 2003 and first published on 10 Mar 2003


Article type: Paper
DOI: 10.1039/B212183B
Citation: Dalton Trans., 2003,0, 1332-1336
  •   Request permissions

    Arsacarborane chemistry. The 7,8,9,11-, 7,9,8,10- and 7,8,9,10-isomers of nido-As2C2B7H9 and some of their halogenated derivatives

    L. Mikulášek, B. Grüner, I. Císařová and B. Štíbr, Dalton Trans., 2003, 0, 1332
    DOI: 10.1039/B212183B

Search articles by author

Spotlight

Advertisements