Solid State Structures of Disiloxanediols. Hydrogen-Bonded Networked Structures

Two kinds of silanediol, 1-(triphenylmethyl)-1,1-dihydroxytrimthyldisiloxane (2a) and 1,2-bis(tri-phenylmethyl)-1,1,3,3-tetrahydroxydisiloxane (2b), were recrystallized from saturated acetone and diethyl ether solutions as single crystals suitable for X-ray crystallographic determination. In their single-crystal X-ray structures, the molecules of 2a and 2b crystallize in triclinic [a = 9.204 Å (α= 87.10(5)), b = 12.496(7) Å(β= 81.50(4)), c = 24.037(10) Å (γ= 74.25(3)) in a unit cell] and triclinic [a = 9.2540(18) Å (α= 110.240(3)), b = 14.169(3) Å (β= 106.902(3))], c = 14.189(3) Å (γ= 101.092(4)) in a unit cell] space groups, respectively. X-ray single-crystal diffraction studies showed that the molecules of silanepolyols 2a and 2b in the solid state are regularly arranged through hydrogen-bonding and hydrophobic interactions. In their solid states, the remarkable hydrogen bondings of silanediol 2a with pyridine and 2b with water lead to one di-mensional columnar tube structures with hydrophilic cores, respectively. Such columnar tubes with hydro-philic cores are regularly packed through hydrophobic interactions of the organic/substituent of the silanediols. KCI Citation Count: 2