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By B. L. Shaw and L. A. K. Stavely (Auth.)

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Extra resources for Inorganic Hydrides

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2 The Ion B10 H10 - M . F. Hawthorne and co-workers found that treatment of the bisacetonitrile complex B 1 H01 (2C H 3C N ) 2 with triethylamine in 34 INORGANIC HYDRIDES boiling benzene gave two isomeric products. One was the expected bis(triethylamine) complex B 1 H01 (2E t 3N ) 2 and the other was 2 a bis(triethylammonium) salt of a new colourless anion B 1H01 ~0 . More recently this anion has been prepared in 8 4 % yield from decaborane-14 by successive treatment with dimethyl sulphide and liquid ammonia, both stages being carried out at or below room temperature.

Dobrott and Lipscomb have determined the structure of the copper(I) salt C u 2B 1 H010 and have shown the anion to have the structure shown in Fig. 12. FIG. 12. Arrangement of boron atoms in B Hf~. Each boron 10 atom has one terminal hydrogen atom bonded to it. r. spectrum which is very simple and shows only two kinds of boron atoms to be present in the ratio of 2 to 8. 2 The Ion B12 H12 ~ 2 and Roberts predicted that an In 1955 Longuet-Higgins icosahedral dianion B 1 H21 "2 would be stable and in 1960 Haw2 thorne and co-workers prepared its triethylammonium salt 2 and {Et 3NH} g B 1 H21 "2 in about 4 % yield from 2-iododecaborane triethylamine reacting in benzene; some ( E t 3N H } J B 1H01 ~0 was2_ also formed in the reaction.

1 3 . Structures of 1 , 2 - (a), 1 , 3 - (b) and 1 , 4 - (c) dicarbaclovododecacarboranes-12. The carbon atoms are shown thus ( • ) , boron atoms are at the other apices. Each boron and carbon atom is bonded to one hydrogen atom. clovo is derived from the Greek word for cage). p. 287-288°C by treating decaborane-14 with diethyl sulphide followed by acetylene B i 0H 14 + E t 2S • B 1H01(2E t 2S ) 2 2 HC=CH • B 1C02H 1. 2 It is the carborane analogue of B 1 H21 -2 and has very high thermal stability.

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