MS36-P17 Further Structural Adventures with Bis-metallacarboranes Georgina Rosair (Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, United Kingdom) Alan Welch (Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, United Kingdom) Anthony Chan (Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, United Kingdom)email: G.M.Rosair@hw.ac.ukMetallacarboranes display great variation in polyhedral size and shape.  They incorporate metal atoms from across the Periodic Table 1 and find application in catalysis, medicine, metal-ion extraction and advanced materials.1
The parent 1,1′-bis(ortho-carborane) (below) has a scaffold which offers extensive potential for derivatisation. Single cage metalation of 1,1′-bis(ortho-carborane) has yielded metallacarborane-carborane species,2 with double cage metalation affording metallacarborane-metallacarborane compounds.2  However such metalation follows double deboronation (removal of one vertex from each cage) so the final products are necessarily homometalated.  Very recently stepwise deboronation and metalation of 1,1′-bis(ortho-carborane) has enabled the synthesis and characterisation of the first examples of heterometalated metallacarborane-metallacarborane species (one example below).  More variety and surprises are revealed in this structural adventure with metallacarboranes.3
 
References:

1. Grimes, R. N. (2016) Carboranes, 3rd ed.; Elsevier: Amsterdam, The Netherlands.

2. Thiripuranathar, G.; Man, W. Y.; Palmero, C.; Chan, A. P. Y.; Leube, B. T.; Ellis, D.; McKay, D.; Macgregor, S. A.; Jourdan, L.; Rosair, G. M.; Welch, A. J. (2015) Dalton Trans., 44, 5628-5637.;.Thiripuranathar, G.; Chan, A. P. Y.; Mandal, D.; Man, W. Y.; Argentari, M.; Rosair, G. M.; Welch, A. J. (2017) Dalton Trans., 46, 1811-1821.

3. Chan, A. P. Y.; Rosair, G. M.; Welch, A. J. (2018) Inorg. Chem., submitted.

Keywords: Carboranes, cages, isomerisation