“…The reaction of the tri-allylborane, B(CH 2 CHQCH 2 ) 3 with the tri-osmium cluster H 2 Os 3 (CO) 10 results in the formation of several new clusters containing coordinated allyl-borane units. 69 A series of 2,5-bis(dimesitylboryl)-1,4-bis(arylethynyl)benzenes that contain various p-substituents on the terminal benzene rings, including NPh, OMe, Me, H, CF 3 , and CN groups, have been synthesised, and the effects of the p-substituents on the absorption and fluorescence properties investigated both in solution and in the solid state. In addition the fluoride ion binding properties of these systems have also been described.…”