(2-Aminoethoxy)bis(2-thienyl)boron

In the five-membered ring in the title compound, (2-aminoethoxy)bis(2-thienyl)boron, C10H12BNOS2, the B atom is four-coordinate with dimensions N-B 1.654 (3), O-B 1.479 (3), and C-B 1.606 (3) and 1.609 (3) Angstrom. An intermolecular hydrogen bond between an amino H atom and the ethoxy O atom links the molecules into infinite chains along the a axis. Only one of the two amino H atoms is involved in hydrogen bonding because there is only the one acceptor atom, the ethoxy O atom, and the molecular geometry precludes formation of a second hydrogen bond by the second amino H atom.