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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 594 (1991), S. 113-118 
    ISSN: 0044-2313
    Keywords: Ca3Cl2CBN ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ca3Cl2CBN, a Compound with the New CBN4- UnitThe new compound Ca3Cl2CBN was obtained from the reaction of Ca and CaCl2 with CaCN2, B and C or with BN and C, in sealed tantalum containers at 900°C. The crystal structure is related with the structure of Ca3Cl2C3 whereas the C34- units (C2v symmetry) are substituted by isoelectronic CBN4- anions (Cs symmetry): Ca3Cl2CBN, Pnma, a = 1 386.7(9) pm, b = 384.7(3) pm, c = 1 124.7(6) pm, Z = 4; R = 0.055, Rw = 0.036 for 380 independent intensities.The CBN4- units are located between layers of Ca2+ that are interconnected by Cl-. The bond angle (C—B—N) is 176° and bond distances are dC—B = 144 pm and dB—N = 138 pm, respectively.
    Notes: Die neue Verbindung Ca3Cl2CBN bildet sich bei der Reaktion von Ca und CaCl2 mit CaCN2, B und C oder mit BN und C in verschweißten Tantalkapseln bei 900°C. Die Kristallstruktur ist mit der Struktur von Ca3Cl2C3 verwandt, wobei statt den C34--Ionen (C2v-Symmetrie) isoelektronische CBN4--Einheiten (Cs-Symmetrie) vorliegen. Ca3Cl2CBN kristallisiert orthorhombisch (Pnma) mit: a = 1 386,7(9) pm, b = 384,7(3) pm, c = 1 124,7(6) pm, Z = 4; R = 0,055, Rw = 0,036 für 380 unabhängige Intensitäten. Die CBN4--Einheiten liegen zwischen Schichten aus Ca2+, die durch Cl- verbrückt sind. Der Bindungswinkel (C—B—N) beträgt 176°, die Bindungslängen dC—B = 144 pm und dB—N = 138 pm.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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