January 1998 issue
cif-access (metal-organic compounds)
This compound is used for the transfer of a tricarbonyliron unit to prochiral dienes to generate optically active diene complexes. It is obtained by condensation of ferroceno[1,2]cyclohex-1-en-3-one with benzaldehyde and subsequent treatment with nonacarbonyliron.
cif-access (organic compounds)
4-Azidobenzenesulfonyl chloride is used as a raw material for the esterification of aliphatic and aromatic mono- and poly- functional alcohols in the preparation of mono-, di- and triazido compounds such as those used in the lithographic structuring of polymers.
Pb2Fe2Ge2O9 is isostructural with melanotekite, Pb2Fe2Si2O9, and is built up of zigzag chains of edge-sharing FeO6 octahedra, linked via Ge2O7 groups and PbII cations. The stereoactivity of the PbII electron lone pairs is revealed by the strongly anisotropic displacement of one O atom.
Na4Co7(PO4)6 is isostructural with Na4Ni7(PO4)6. The structure contains CoO6 and CoO4 polyhedra and PO4 tetrahedra connected by corner and edge sharing to form a three-dimensional network. The Na+ ions occupy tunnels running parallel to the a axis.