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Two new complexes, [Cd2(4-4′-bpy)2(pa)4] n ·0.25H2O ( 1) (pa = phenylacetate), and [Mn(4-4′-bpy)2(pa)(H2O)3]ClO4·2H2O, ( 2), have been obtained from hydrothermal reaction of Cd(NO3)2·4H2O and Mn(ClO4)2·6H2O with a mixture of the ligands, 2-phenylmalonic acid (2-phmalH2) and 4-4′-bipyridine (4-4′-bpy). The pa is formed in situ by decarboxylation of phenylmalonic acid. These complexes have been characterized by elemental analysis, FT-IR spectroscopy, thermogravimetric analysis and single-crystal X-Ray diffraction. The Cd(II) center is seven-coordinate and linked via pa ligands to form a binuclear complex in the asymmetric unit of 1. A ladder-like 1D chain of binuclear units is formed by Cd(II)–N coordination bond through 4-4′-bpy ligands. Complex 2 consists of a mononuclear manganese center based on a distorted octahedral geometry and exhibits a supramolecular structure containing hydrogen bonds and extensive π···π and C–H···π interactions. [ABSTRACT FROM AUTHOR]

Abstract: The synthesis of the first all-tin-dendrimer Sn[(CH2)4SnPh3]4 (2) results from complete hydrostannation of tetra(but-3-enyl)stannane (1) with triphenyltin hydride. Selective cleavage of one phenyl group from each dendron of 2 with anhydrous HCl results in Sn[(CH2)4Sn(Cl)Ph2]4 (3), which on treatment with LiAlH4 yields the corresponding hydride derivative Sn[(CH2)4Sn(H)Ph2]4 (4) containing four reactive Sn–H bonds. The cyclopentadienyl derivative Sn[(CH2)4Sn(C5H5)Ph2]4 (5) as well as the transition metal substituted derivatives Sn[(CH2)4Sn{Co(CO)4}Ph2]4 (6), Sn[(CH2)4Sn{Fe(CO)2C5H5}Ph2]4 (7), and Sn[(CH2)4Sn{Mn(CO)5}Ph2]4 (8) have been prepared by coupling of 3 with the appropriate Grignard or sodium derivatives of the transition metal moieties. The new compounds were characterized by elemental analyses, IR, 1H-, 13C- and 119Sn NMR spectroscopy and MALDI-TOF mass spectrometry. [Copyright &y& Elsevier]