Darstellung von Mononitropentahydrohexaborat(2-) und Kristallstruktur von M 2 [B 6 H 5 (NO 2 )], M = K, Cs / Preparation of Mononitropentahydrohexaborate(2—) and Crystal Structure of M 2 [B 6 H 5 (NO 2 )], M = K, Cs
By electrochemical oxidation of [B 6 H 6 ] 2- in the presence of nitrite ions and the base DBU in dichloromethane solution mononitropentahydrohexaborate [B 6 H 5 (NO 2 )] 2- ions are formed and can be isolated by ion exchange chromatography on diethylaminoethyl cellulose. The crystal structures of t...
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| Published in | Zeitschrift für Naturforschung. B, A journal of chemical sciences Vol. 48; no. 12; pp. 1727 - 1731 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
01.12.1993
|
| Online Access | Get full text |
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| Summary: | By electrochemical oxidation of [B
6
H
6
]
2-
in the presence of nitrite ions and the base DBU in dichloromethane solution mononitropentahydrohexaborate [B
6
H
5
(NO
2
)]
2-
ions are formed and can be isolated by ion exchange chromatography on diethylaminoethyl cellulose. The crystal structures of the K and Cs salt were determined from single crystal X-ray diffraction analyses. K
2
[B
6
H
5
(NO
2
)] is monoclinic, space group P2
1
/m with a = 5.953(1), b = 8.059(4), c = 8.906(1) Å, β = 109.553(9)°; Cs
2
[B
6
H
5
(NO
2
)] is monoclinic, space group P2
1
/a with a = 9.438(6), b = 9.644(7), c = 11.138(9) Å, β = 101.44(9)°. The B
6
octahedron is compressed in the direction of the B—NO
2
bond by about 5%, with bond lengths between 1.67 and 1.77 A. |
|---|---|
| ISSN: | 0932-0776 1865-7117 |
| DOI: | 10.1515/znb-1993-1206 |