Acta Crystallographica Section B

Structural Science

Volume 60, Part 2 (April 2004)

Acta Cryst. (2004). B60, 238-248 [doi:10.1107/S0108768104002344]

Hydrogen-bonded adducts of triphenylsilanol with diamines: a finite ten-molecule aggregate, and chain, sheet and framework structures built from O-HO, O-HN and C-H(arene) hydrogen bonds

D. E. Turkington, A. J. Lough, G. Ferguson and C. Glidewell

Abstract: The structures of five hydrogen-bonded adducts of triphenylsilanol, Ph₃SiOH, with diamines have been determined. In the 4:1 adduct formed with 1,4-diazabicyclo[2.2.2]octane, (Ph₃SiOH)₄·C₆H₁₂N₂ (I) (triclinic, P $\bar 1$ , Z' = 2), there are two independent five-component aggregates built from O-HN and O-HO hydrogen bonds, in one of which the diamine exhibits orientational disorder: these two aggregates are linked into a cyclic ten-molecule unit by means of two independent C-H [bold pi] (arene) hydrogen bonds. The 4:1 adduct formed with 1,2-bis(4-pyridyl)ethene, (Ph₃SiOH)₄·C₁₂H₁₀N₂ (II) (triclinic, P $\bar 1$ , Z' = 0.5), forms a similar five-component aggregate which lies across a centre of inversion: a single C-H(arene) hydrogen bond links these aggregates into a molecular ladder. With N,N'-dimethylpiperazine, triphenylsilanol forms a 2:1 adduct, (Ph₃SiOH)₂·C₆H₁₄N₂ (III) (monoclinic, P2₁/c, Z' = 0.5), in which a three-component aggregate built from O-HN hydrogen bonds lies across a centre of inversion: two independent C-H [bold pi] (arene) hydrogen bonds link these aggregates into sheets. In the hydrated 2:1 adduct formed with 1,2-bis(4'-bipyridyl)ethane, (Ph₃SiOH)₂·C₁₂H₁₂N₂·H₂O (IV) (triclinic, P $\bar 1$ , Z' = 1), a combination of two independent O-HO and two independent N-HO hydrogen bonds links the five molecular components into a centrosymmetric eight-molecule aggregate, and six independent C-H [bold pi] (arene) hydrogen bonds link these chains into a continuous three-dimensional framework structure. In the dihydrated 2:1 adduct formed with 4,4'-bipyridyl, (Ph₃SiOH)₂·C₁₀H₈N₂·(H₂O)₂ (V) (triclinic, P $\bar 1$ , Z' = 1), a combination of four independent O-HO and two independent N-HO hydrogen bonds links the five molecular components into a chain of rings, and four independent C-H [bold pi] (arene) hydrogen bonds link these chains into a continuous three-dimensional framework structure.

Online 18 March 2004


	Structure factor file (CIF format) (1437.5 kbytes) Contains datablock I

	Structure factor file (CIF format) (388.5 kbytes) Contains datablock dt01

	Structure factor file (CIF format) (158.2 kbytes) Contains datablock dt09

	Structure factor file (CIF format) (447.3 kbytes) Contains datablock dt12

	Structure factor file (CIF format) (360.3 kbytes) Contains datablock V

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