N-(Ferrocenylmethyl)-dodecan-1-amine.

The title compound, [Fe(C(5)H(5))(C(18)H(32)N)], was synthesized by the amination of ferrocenecarbaldehyde. In the complex, the two cyclo-penta-dienyl (Cp) rings are almost parallel with a dihedral angle of 1.36 (8)°, and are separated by a centroid-centroid distance of 3.299 (2) Å. In the crystal, adjacent mol-ecules are linked into a one-dimensional supra-molecular structure via weak C-H⋯π inter-actions between the Cp ring H atom and the Cp ring.

New cyclodextrin derivative 6-O-(2-hydroxybutyl)-beta-cyclodextrin: preparation and its application in molecular binding and recognition.

A new soluble cyclodextrin derivative 6-O-(2-hydroxybutyl)-beta-cyclodextrin (6-HB-beta-CD) was prepared. Its molecular binding and recognition ability were investigated with the comparison of beta-cyclodextrin (beta-CD), 2-O-(2-hydroxypropyl)-beta-cyclodextrin (2-HP-beta-CD), 6-O-(2-hydroxypropyl)-beta-cyclodextrin (6-HP-beta-CD), and 2-O-(2-hydroxybutyl)-beta-cyclodextrin (2-HB-beta-CD). The relationship between the complex stability constants and the possible structures of inclusion compounds was discussed with the interaction of hosts and guests, including the weak hydrophobic interactions, the size/shape matching, the steric hindrance, and the hydrophilic property.