title: Hydrogen-bonded layered structures in two bis(tert-butyldimethylsilyloxy)-substituted cyclic diol derivatives.
abstract: 2,6-Bis(tert-butyldimethylsilyloxy)-9-oxabicyclo[3.3.1]nonane-3,7-diol, C(20)H(42)O(5)Si(2), (I), and 4,8-bis(tert-butyldimethylsilyloxy)-2,6-dioxatricyclo[3.3.1(3,7)]decane-1,3-diol, C(20)H(40)O(6)Si(2), (II), form layered structures that differ in the way the molecules are connected within each layer. The endocyclic O atom common to both structures plays an active role in the hydrogen-bonding network, whereas the second oxygen bridge in (II) does not participate in any interaction. This work reports the first structural analysis of two bis(tert-butyldimethylsilyloxy)-substituted cyclic diol derivatives and provides insight into the influence of small changes in the molecular structure on the supramolecular aggregation. The unbalanced hydrogen-bond acceptor/donor ratio, greater in (II) than in (I), does not result in the inclusion of water molecules in the structure.
authors.affiliation: Instituto Rocasolano, CSIC, Departamento de Cristalografía, Madrid, Spain. cfoces@iqfr.csic.es
authors.forename: C
authors.initials: C
authors.lastname: Foces-Foces
authors.forename: M
authors.initials: M
authors.lastname: López-Rodríguez
mesh_terms: D000438:Alcohols / Q000302:isolation & purification*; D001643:Bridged Bicyclo Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006575:Heterocyclic Compounds, 3-Ring / Q000138:chemical synthesis / Q000737:chemistry*; D006860:Hydrogen Bonding; D015394:Molecular Structure; D013237:Stereoisomerism
chemical_list: D000438:Alcohols; D001643:Bridged Bicyclo Compounds; D006575:Heterocyclic Compounds, 3-Ring