Inorganic

Download B Boron Compounds: Boron and Chalcogens. Carboranes. Formula by Karl Beeker, Thomas Onak, Kurt Niedenzu, Ursula Hettwer PDF

By Karl Beeker, Thomas Onak, Kurt Niedenzu, Ursula Hettwer

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Additional info for B Boron Compounds: Boron and Chalcogens. Carboranes. Formula Index for 1st Suppl. Vol. 1 to 3

Example text

W. Rudolph (Inorg. Chern. 14 [1975] 2459/62). - [14] W. R. Pretzer, R. W. Rudolph (J. Chern. Soc. Chern. Cornrnun. 1974 629/30). - [15] J. Ple§ek, S. Herrnanek, Z. Janou§ek (Collection Czech. Chern. Cornrnun. 42 [1977] 785/92). [16] F. Tebbe, P. M. Garrett, M. H. Hawthorne (J. Arn. Chern. Soc. 90 [1968] 869/79). [17] A. O. Clouse, D. C. Moody, R. R. Rietz, T. Rosberry, R. Schaeffer (J. Arn. Chern. Soc. 95 [1973] 2496/501). - [18] S. Hei'rnanek, J. Ple§ek (Z. Anorg. Allgern. Chern. 409 [1974] 115/20).

Chern. Cornrnun. 1976 770/1). 0) kcal/rnol [3] (s. S. 0) bzw. 0) kcal/rnol berechnet [4]. 25 Nach den von [5] durchgeführten MO-Rechnungen für HBS und der Form der ersten Photoelektronenbande [1, 2] besitzt das höchste, hauptsächlich am S lokalisierte Orbital ,,-Symmetrie und bindende Eigenschaften, was auch nach dem Walsh- Diagramm [6] vorhergesagt wird. Nach [4] kann man daher bei [HBS]+ eine geringere Bindungsstärke annehmen als beim HBS. Entsprechend beim HCN (s. 680A, <}:H-B-S=180°. 7688 x 10-39 g .

Charalambous, H. J. Davies, M. J. Frazer, W. Gerrard (J. Chem. Soc. 1962 1505/7). 3 H 20; 8 2° 3 , 65° 3 , 8 H 20; 28 2° 3 , 55° 3 , 4H 20; 28 2° 3 , 65° 3 , 4H 20; 38 20 3 ' 5° 3 , 3H 20. Die Darstellung erfolgt leicht aus B20 3 ' 2S0 3 und H2S0 4 bzw. H 3B0 3 + S03 in entsprechenden Mengenverhältnissen oder aus Mischungen von B20 3 und Oleum. Die jeweils homogenen Schmelzen werden bei der Temperatur des flüssigen Stickstoffs in den Glaszustand übergeführt und dann langsam erwärmt. Durch Rühren während einer Woche bei 25°C erfolgt Kristallisation und GleichgewichtseinsteIlung zwischen Schmelze und kristallisierter Phase.

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