ISSN:
0044-2313
Keywords:
Halogeno-nonahydro-closo-decaborates(2-)
;
Crystal Structures
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Crystal Structures of Dipyridiniomethane Monohalogenohydro-closo-Decaborates(2-), [(C5H5N)2CH2][2-XB10H9]; X = Cl, Br, I[B10H10]2- reacts with chlorine, bromine and iodine or with N-halogenosuccinimide, yielding the monohalogenodecaborates [2-XB10H9]2- (X = Cl, Br, I), which are separated by ion exchange chromatography on diethylaminoethyl(DEAE) cellulose from the starting compound and higher halogenated products. The X-ray structure determinations of the isotypic chloro and bromo compounds [(C5H5N)2CH2][2-XB10H9] (monoclinic, space group C2/c, Z = 8; for X = Cl: a = 33.174(5), b = 7.2809(4), c = 16.2232(7) Å, β = 113.307(7)°; for X = Br: a = 33.525(11), b = 7.281(2), c = 16.297(4) Å, β = 113.62(2)°) and of the iodo compound [(C5H5N)2CH2][2-IB10H9] (monoclinic, space group P21, Z = 2, a = 7.143(3), b = 13.568(4), c = 9.479(7) Å, β = 97.57(5)°) show columns of substituted boron clusters [2-XB10H9]2-, X = Cl, Br, I and bent dications [(C5H5N)2CH2]2+ along the shortest axis wich are assembled to alternating layers in the crystal lattice.
Notes:
[B10H10]2- reagiert mit Chlor, Brom und Iod bzw. mit N-Halogensuccinimid zu den entsprechenden Monohalogenodecaboraten [2-XB10H9]2- (X = Cl, Br, I). Die Verbindungen werden durch Ionenaustauschchromatographie an Diethylaminoethyl(DEAE)-Cellulose von der Ausgangssubstanz und höher halogenierten Produkten getrennt. Die Röntgenstrukturanalysen der isotypen Chloro- und Bromoverbindungen [(C5H5N)2CH2][2-XB10H9] (monoklin, Raumgruppe C2/c, Z = 8; für X = Cl: a = 33,174(5), b = 7,2809(4), c = 16,2232(7) Å, β = 113,307(7)°; für X = Br: a = 33,525(11), b = 7,281(2), c = 16,297(4) Å, β = 113,62(2)°) und der Iodoverbindung [(C5H5N)2CH2][2-IB10H9] (monoklin, Raumgruppe P21, Z = 2, a = 7,143(3), b = 13,568(4), c = 9,479(7) Å, β = 97,57(5)°) zeigen im Kristallgitter Stränge der substituierten Clusteranionen [2-XB10H9]2-, X = Cl, Br, I und der Dikationen [(C5H5N)CH2]2+ in Richtung der kürzesten Achse, die in alternierenden Schichten angeordnet sind.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19956211003
