Hydrogen-bonded adducts of ferrocene-1,1'-diylbis(diphenylmethanol) with nitrogenous bases: crystal and molecular structure of the 2:1 adduct with hexamethylenetetramine

Article abstract of DOI:10.1016/0022-328X(94)05312-Y

Ferrocene-1,1'-diylbis(diphenylmethanol), forms hydrogen-bonded host-guest adducts with nitrogenous bases.A 2:1 adduct is formed with hexamethylenetetramine, <(CH2)6N4>, 1:1 adducts with 1,4-dimethylpiperazine and 1,4-diazabicyclo<2.2.2>octane and a 1:2 adduct with 3-pyridylferrocene.The crystal structure of the hexamethylenetetramine adduct has been determined.The structural unit contains two molecules of the host ferrocenediol and one molecule of the guest; the diol forms both intramolecular O-H...O and intermolecular O-H...N hydrogen bonds, but two of the four nitrogen atoms in the <(CH2)6N4> guest molecules play no part in the hydrogen bonding.Keywords: Iron; Ferrocene; Host-guest adducts; Hydrogen bonding; Crystal structure