Hydrogen bonding principles in inclusion compounds of triphenylsilanol and pyrrolidine: Synthesis and structural features of [(Ph3SiOH)(4)center dot HN(CH2)(4)] and [Ph3SiOH center dot HN(CH2)(4)center dot CH3CO2H]

摘要

The inclusion of small molecules, such as amines, into hydrogen-bonded assemblies is an important task for a selective enclathration of substance mixtures. Here we report on a convenient method to entrap a simple monoamine by using the acidic nature of a silanol hydroxyl group. In detail, the co-crystallisation of triphenylsilanol and pyrrolidine leading to a defined hosteguest compound (1) with a 4: 1 stoichiometric composition is presented. The addition of acetic acid to a mixture of the silanol and the amine resulted in the formation of co-crystals (2) comprising the three substances in a 1:1:1 ratio. The structural features, especially in terms of hydrogen-bonding interactions are discussed for both compounds. (C) 2015 Elsevier B.V. All rights reserved.