Crystal Structure of a 1,1-dibutyl-1,3-naphtho[1,8-][1,2,6]oxastannaborinin-3-ol

The title oxastannaborininol compound, [Sn(CH)(CHBO)], has been synthesized and crystallized. While heterocycles containing a C-O-B group are common, heterocycles containing an -O-B unit, where is an element of the carbon group except for carbon, are rare. In fact, while heterocycles containing Si-O-B units are occasionally reported (although without crystal structures), there are no reports for the corresponding germanium, tin or lead analogues. Herein, the first synthesis and crystal structure of a heterocycle containing an Sn-O-B unit is described. The asymmetric unit contains one mol-ecule showing a notable disorder of the tin atom and the butyl groups. They occupy two sets of positions with site-occupancy factors of 0.295 (6) and 0.705 (6).