The discovery of a new class of compounds: Carboranes

Abstract

The first member of a new class of carborane compounds, 1-isopropenylcarborane, was discovered during a broad-scale investigation of the use of boron hydrides as propellants for the U.S. Air Force.

Vapor Phase Isomerization of o-Carborane

“…In addition to the loss of HF by thermal splitting, chlorinolysis and coupling reactions also occurred. These side reactions were circumvented by chlorination in the presence of ultraviolet light as well as heat (7,3). Ethylidene fluoride was chlorinated in the presence of ultraviolet light to yield essentially l-chloro-l,l-difluoroethane (2) by using aqueous hydrochloric acid as an internal cooling medium in the reaction zone to regulate the temperature at 80°to 120°C.…”

The Unintended Revolution in Academic Libraries: 1939 to 1989 and Beyond

“…Although federal aid to libraries was almost nonexistent in 1939, it began to 18 Budgeting for technology has been one of the major difficulties since the 1960s. Traditionally, 60 percent of the library budget had been used for salaries, 30 percent for materials, and 10 percent for other expenses.…”

Les liaisons triangulaires changent les perspectives de la chimie

“…L'atome de carbone possède un électron de plus que le bore, donc le dianion B 12 H 12 2serait isoélectronique avec le dicarbaborane icosaédrique, C 2 B 10 H 12 (Fig. 7), qui fut découvert par hasard en 1957 [8,9]. Il en existe trois isomères (Fig.…”