Detail Aldehyde coordination in template reactions: Crystal structure of a possible reaction intermediate (article of Inorganic Chemistry Communications Issue 38 (2013) p.156–159) Bibliografi Author: Won, Mi Seon ; Lee, Young Hoon ; Rukmini, Elisabeth ; Harrowfield, Jack M. ; Kim, Yang Topik: Aldehyde coordination; Crystal structure; Template effect; JABFUNG-ELR-2018-22 Bahasa: (EN )     Penerbit: Elsevier     Tahun Terbit: 2013     Jenis: Article - diterbitkan di jurnal ilmiah internasional Fulltext: won2013.pdf (355.27KB; 1 download) Abstract The aldehyde complex [Zn(Im4al)2(NO3)2],where Im4al=imidazole-4-aldehyde (N(1)H tautomer), crystallizes frommethanol as amonoclinic species, space group C2/c, a 15.890(3), b 6.8920(14), c 14.077(3) Å, ß 119.67(3) °. Its structure solution shows that the aldehyde–O donors are situated relatively distant (2.57(2) Å) fromthe metal ion centre, creating uncertainty as towhether themetal should be described as 4- or 6-coordinate. The seemingly very weak interaction of the aldehyde–O atoms with the Zn(II) indicated by the calculation of the Hirshfeld surface for themolecule in its lattice is consistent with the fact that thismetal ion does not favour hydration of the aldehyde in aqueous solution. It may indicate that the role of the metal ion in template reactions involving the aldehyde and amines is to poise the aldehyde–C between its “unactivated”, and probably quite differently solvated, free state and a second state which is not sufficiently activated to favour addition of solvent water (or methanol) but which is activated sufficiently to undergo rapid addition of an amine nucleophile. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Lihat Sejarah Pengadaan  Konversi Metadata   Kembali

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