UNUSUAL HEXACOORDINATION IN A TRIORGANOTIN FLUORIDE SUPPORTED BY INTERMOLECULAR HYDROGEN-BONDS - CRYSTAL AND MOLECULAR-STRUCTURES OF 5-STANNA-5-HALOGENOTRICYCLO[3.3.3.0(1.5)]UNDECANES N(CH2CH2CH2)(3)SNF-CENTER-DOT-H2O AND N(CH2CH2CH2)(3)SNX (X=CL, BR, I)

Synthesis of N(CH2CH2CH2)(3)SnF . H2O (1a) and MeN(CH2CH2CH2)(2)SnFMe . H2O (5a) and molecular structures of 1a and N(CH2CH2CH2)(3)SnX (2, X = Cl; 3, X = Br; 4, X = I) are reported. Compound la is a tetramer he ld together by intermolecular Sn...F interactions (2.797(6) Angstrom) and F...H and O...H hydrogen bridges. It is the first example of an in termolecular hexacoordinated triorganotin halide. Compounds 2-4 exhibi t the expected propellane (metallatrane) structure with pentaccordinat e tin, with the shortest intramolecular Sn...N interaction of 2.28(2) Angstrom found for 3. The Sn...N distances in the other stannatranes a re 2.393(5) and 2.426(6) (1a), 2.38(2) (2, hexagonal), 2.38(4) (2, mon oclinic), and 2.375(6) Angstrom (4).