Closoborate anions as a means of synthesizing new coordination compounds

Carboranes: A New Class of Weakly Coordinating Anions for Strong Electrophiles, Oxidants, and Superacids

“…12 Nevertheless, CB 11 H 12lay essentially fallow in the literature for a couple of decades. The only significant recognition of the weakly coordinating ability of closo-borate anions was in the work of Zakharova,13…”

“…Nevertheless, CB 11 H 12 - lay essentially fallow in the literature for a couple of decades. The only significant recognition of the weakly coordinating ability of closo -borate anions was in the work of Zakharova, who used the dianions to prepare labile salts of Ni(II) and Pd(II), e.g. [Ni(MeCN) 6 ][B 12 H 12 ].…”

Vibrational spectroscopy of carboranes and parent boranes and its capabilities in carborane chemistry

“…However, the comparison reveals much the same frequencies for related modes, which are similar in symmetry and character; this is striking and points to similar force fields of these anions. Full Raman and IR spectra of solid cesium salts of Bi0H102" and its 2-halogenated derivatives of the type 2-XB10H92", X = Cl, Br, I have been presented by Preetz et al 86 The authors have noted complex multiplets in the j/(BH) Raman region; the pattern observed is not much influenced by the introduction of different halogen atoms. These observations agree well with the above discussion (section II) about the reasons for the p(BH) band splitting.…”

Vertex Differentiation Strategy for Tuning the Physical Properties of closo-Dodecaborate Weakly Coordinating Anions

“…Another class of WCAs that does not necessitate stabilizing halogen-substituted aryl or alkyl groups is based on polyhedral boron clusters . Early pioneering works by Knoth et al, Reed et al and Štíbr et al developed WCAs using highly symmetrical, three-dimensional polyhedral monocarborane clusters [HCB 11 H 11 ] − and [HCB 9 H 9 ] − .…”