Preparation and characterization of the 1:1 adducts of mercury(II) halides with N-benzyl- and N-p-tolyl-2-oxo-1-naphthylideneamine. The crystal and molecular structures of two isostructural di-œ-halo-bis[halo(N-benzyl-2-oxo-1-naphthylideneamine)-mercury(II)] adducts (halo = chloro, bromo)
- Autor(en)
- Zora Popovic, Vibor Roje, Gordana Pavlovic, Dubravka Matkovic-Calogovic, Masa Rajic, Gerald Giester
- Abstrakt
A series of adducts of the type HgX2(C18H15NO) [X = Cl-, Br-, I-; C18H15NO = N-benzyl-2-oxo-1-naphthylideneamine (bznapH), N-p-tolyl-2-oxo-1-naphthylideneamine (tolnapH)] was obtained by refluxing the solution of the corresponding mercury(II) salt and the related naphthylideneamine in absolute ethanol in a 1:1 molar ratio. The adducts di-œ-chloro-bis[-chloro(N-benzyl-2-oxo-1-naphthylideneamine)mercury(II)], HgCl2(bznapH) (1) and di-œ-bromo-bis[bromo(N-benzyl-2-oxo-1-naphthylideneamine)mercury(II)], HgBr2(bznapH) (2) are isostructural with the effective coordination of mercury being 2+2. The HgX2 moieties are retained in the adducts and contain two covalently linked chlorine [2.321(3) and 2.299(3) A° in 1] or bromine atoms [2.446(1) and 2.422(1) A° in 2]. These moieties are linked mutually by additional contacts of bridging halogen atoms [HgžžžœX 3.189(2) and 3.298(1) A° in 1 and 2, respectively], forming non-planar dimeric Hg2X4 units. Each Schiff-base ligand has a strong contact with mercury through the oxygen atom [HgžžžO 2.392(5) and 2.410(5) A° in 1 and 2, respectively]. The Schiff-base ligand in 1 and 2 exists as the ketoamino (quinoid) tautomeric structure with an intramolecular hydrogen bond of the N-HžžžO type [2.58(1) and 2.59(1) A° in 1 and 2, respectively]. On the contrary, in DMSO solution, due to dissociation of adducts 1-6, the enolimino (benzenoid) tautomeric form of the Schiff bases was established by NMR spectroscopy. Œ 2001 Elsevier Science B.V. All rights reserved.
- Organisation(en)
- Institut für Mineralogie und Kristallographie
- Externe Organisation(en)
- University of Zagreb, Brodarski Institute, Marine Research and Special Technologies
- Journal
- Inorganica Chimica Acta
- Band
- 322
- Seiten
- 65-73
- Anzahl der Seiten
- 9
- ISSN
- 0020-1693
- Publikationsdatum
- 2001
- Peer-reviewed
- Ja
- ÖFOS 2012
- 1051 Geologie, Mineralogie
- Link zum Portal
- https://ucris.univie.ac.at/portal/de/publications/preparation-and-characterization-of-the-11-adducts-of-mercuryii-halides-with-nbenzyl-and-nptolyl2oxo1naphthylideneamine-the-crystal-and-molecular-structures-of-two-isostructural-dihalobishalonbenzyl2oxo1naphthylideneaminemercuryii-adducts-halo--chloro-bromo(4b90e2c9-804d-4f5f-9430-6e56e216c1b4).html