Double piperazinediium and 1,4-diazabicyclo[2.2.2] octanediium MII selenates (M-II = Co-II, Ni-II, Cu-II, Zn-II) as effective catalysts for Henry reaction

作者：Nkhili Nouha Loulou; Rekik Walid; Mhiri Tahar; Mahmudov Kamran T; Kopylovich Maximilian N^*; Naili Houcine

来源：Inorganica Chimica Acta, 2014, 412: 27-31.

DOI：10.1016/j.ica.2013.12.007

• Hybrid materials
• Double salts
• Crystal structure
• Jahn
• Teller effect
• Henry reaction

New organically templated complexes {(C4H12N2)[MII(H2O) 4(SeO4)(2)]}center dot 2H(2)O [M-II = Co (1), Cu (2) and Zn (3)] were prepared by slow evaporation of aqueous solution containing metal(II) carbonate, selenic acid and piperazine taken in 1: 2: 1 M ratio. The compounds 1-3 were characterized by IR spectroscopy, ESIMS, elemental and single-crystal X-ray diffraction analyses. The structures of the compounds contain [C4H12N2](2+) cation, H2O molecules and the [MII(H2O)(4)(SeO4)(2)](2) anions interlinked by Ow-Hw center dot center dot center dot O and N-H center dot center dot center dot O hydrogen bonding. 1-3 and known analogous mixed salts (C6H14N2)[MII(H2O)(6)](SeO4)(2) [MII = Ni (4), Zn (5)] (C6H12N2 = 1,4-diazabicyclo[2.2.2] octane) are effective catalysts in the synthesis of b-nitroalkanols from nitroethane and aliphatic or aromatic aldehydes with yields up to 93% and threo/erythro ratio up to 79: 21.

• 出版日期2014-3-1