{Tris[3-(adamantan-1-yl)-5-isopropylpyrazol-1-yl-κN2]hydroborato}thallium(I): the scorpionate with the most bulk?

Abstract

In the thallium(I) complex, [Tl(C48H70BN6)], of tris[3-(adamantan-1-yl)-5-isopropylpyrazol-1-yl]hydroborate, the most hindered scorpionate ligand, the Tl(I) ion is coordinated by three N atoms from the anionic tridentate chelating ligand [average Tl-N bond length = 2.522 (4) Å] in a distorted trigonal-pyramidal environment [average N-Tl-N angle around the Tl(I) ion = 76.4 (1)°]. This coordination geometry is compared with that of the reported Tl(I) complex of the super-hindered tris(7-tert-butylindazol-2-yl)hydroborate ligand.