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'Schiff Bases' in keywords Facet   section ZfN Section B  [X]
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1Author    Christian Dietz, FrankW. Heinemann, Andreas GrohmannRequires cookie*
 Title    Uniform Sidearm Derivatisations in a Tetrapodal Pentaamine: Ligands with NN4 O4 Donor Sets, and a Bis(Ferrocenecarbaldehyde Aminal)  
 Abstract    The tetrapodal pentaamine 2,6-C5H3N[CMe(CH2NH2)2l2 (pyN_u 1) readily reacts with four equivalents of 2-hydroxyphenyl-substituted carbonyl compounds, such as (i) 2-hydroxybenz-aldehyde, (ii) 2,4-dihydroxybenzaldehyde, (iii) 3,5-di-rm-butyl-2-hydroxybenzaldehyde, and (iv) 2-hydroxyacetophenone, to give the corresponding Schiff base derivatives with N N 4O .1 donor sets (i: 2; ii: 3, iii: 4; iv: 5). With ligand 5, two transition metal complexes (M = Ni1 (6), Cu1 1 (7)) have been isolated, which are dinuclear and contain square-planar M(N202) units, linked by a pyridine-derived spacer whose nitrogen atom is uncoordinated. The reaction of 1 with ferrocenecarbaldehyde affords, under neutral conditions and irrespective of an excess of the aldehyde present, the bis(aminal) 8 as the major product, in which the two 1,3-propylenediamine subunits of 1 have condensed with two carbaldehyde moieties to give two 1,3-diazacyclohexane rings. All compounds have been characterised by IR spectroscopy and elemental analysis, as well as 'H and l3C NMR spectroscopy (except paramagnetic 7). The crystal structures of compounds 2, 6, 7, and 8 have been determined. 
  Reference    Z. Naturforsch. 55b, 1037—1044 (2000); received July 28 2000 
  Published    2000 
  Keywords    Nonadentate Ligand, Schiff Base, Nickel 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-1037.pdf 
 Identifier    ZNB-2000-55b-1037 
 Volume    55 
2Author    KhM. HassanRequires cookie*
 Title    Studies on Ferrocene and its Derivatives, VI Cyclocondensation Reactions of Some Ferrocenyl Anils  
 Abstract    Ferrocenealdehyde have been condensed with some amines giving the corresponding Schiff bases. Cyclocondensation reaction of chloroacetylchloride (or thioglycolic acid) on ferrocenyl Schiff bases yielded ferrocenyl-/Mactams and ferrocenylthiazolidinones. 
  Reference    Z. Naturforsch. 33b, 1508—1514 (1978); received May 31 1978 
  Published    1978 
  Keywords    Schiff Bases, Ferrocenyl Anils, Cyclocondensation Reactions 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-1508.pdf 
 Identifier    ZNB-1978-33b-1508 
 Volume    33 
3Author    T. Sogo, J. Romero, A. Sousa, A. De Blas, M. L. Durán, E. E. CastellanoRequires cookie*
 Title    The Electrochemical Synthesis of Neutral Zinc(II) Complexes of Schiff Base Ligands: The Crystal Structure of Bis[N-(4-methylphenyl)salicylaldiminato]zinc(II)  
 Abstract    The electrochemical synthesis and physico-chemical properties of neutral zinc(II) complexes of bidentate Schiff bases derived from salicylaldehydes are presented together with the X-ray struc-ture of bis[N-(4-methylphenyl)salicylaldiminato]zinc(II). The crystal is monoclinic, a = 21.877(3), b = 8.801(2), c = 12.027(5) Ä, ß = 96.55(3)°, space group C2/c. The complex is a monomer, and the zinc atom is tetrahedrally coordinated. 
  Reference    Z. Naturforsch. 43b, 611—615 (1988); received November 5 1987/January 28. 1988 
  Published    1988 
  Keywords    X-Ray, Zinc, Schiff Bases, Electrochemical Synthesis 
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 TEI-XML for    default:Reihe_B/43/ZNB-1988-43b-0611.pdf 
 Identifier    ZNB-1988-43b-0611 
 Volume    43 
4Author    Henri Brunner, M. Arkus, N. Iem Etz, M. Anfred ZabelRequires cookie*
 Title    Optisch aktive Ubergangsmetall-Komplexe, 122 [1]. Synthese von Palladium(II)-Schiff-Base-Komplexen -intramolekulare Wechselwirkungen O ptically Active Transition M etal C om plexes, 122 [1], Synthesis of Palladium (II) Com plexes w ith Schiff B ase Ligands -Intram olecular Interactions  
 Abstract    Imines of salicylaldehyde and 2,6-diformyl-p-cresol have been used as ligands in palla­ d iu m ^) complexes. Enantiomerically pure ligands give enantiomerically pure complexes, racemic ligands give racemates and meso-forms. Differences between the respective isomers of the ligands within the complexes and between the diastereomers of the complexes were investigated. Crystal structure analyses established the trans configuration at the metal center. 
  Reference    Z. Naturforsch. 55b, 145—154 (2000); eingegangen am 25. Oktober 1999 
  Published    2000 
  Keywords    Schiff Bases, Palladium(II) Complexes, Diastereomers, Crystal Structure 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0145.pdf 
 Identifier    ZNB-2000-55b-0145 
 Volume    55 
5Author    MagedA. OsmanRequires cookie*
 Title    Synthesis of Low Melting Liquid Crystalline N-(4-n-Alkylbenzilidene)-4'-n-aIkylanilines  
 Abstract    The synthesis of a number of dialkylbenzilidene anilines is described. Mesomorphic phases are found at or below room temperature. An efficient method for the preparation of the 4-n-alkylanilines and their benzilidene derivatives is described. 
  Reference    (Z. Naturforsch. 31b, 801—804 [1976]; received February 18 1976) 
  Published    1976 
  Keywords    Liquid Crystals, Schiff Bases, Dialkylbenzilidene Anilines, p-n-Alkylanilines, Mesophases 
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 TEI-XML for    default:Reihe_B/31/ZNB-1976-31b-0801.pdf 
 Identifier    ZNB-1976-31b-0801 
 Volume    31 
6Author    E. M. Ilia Bértolo2, RufinaB. Astidaa ', A. Ndrés De Blasb, D. Avid, E. Fenton0, A. Lejandro, M. Acíasa, A. Dolfo, R. Odrígueza, Teresa Rodríguez-B, A. Lasb, V. Na, Illar1Requires cookie*
 Title    Four Novel N 3 O 4 Donor Macrocycles and their Lanthanide(III) Complexes  
 Abstract    A new series of lanthanide(III) complexes with two novel Schiff-base macrocycles, L 1 and L2, containing a N3O4 donor set have been prepared by cyclocondensation of 2,6-bis(2-formylphen-oxymethyl)pyridine and l,2-bis(2-aminophenoxy)ethane or l,3-bis(2-aminophenoxy)propane, respectively, in the presence of the appropriate metal salt as a template agent. In the absence of the metal salt the macrocycles are not formed. The diamine macrocycles L3 and L4 are also formed by reaction of the corresponding diamine and dicarbonyl precursors followed by an in situ reduction with NaBH4. Their complexation potential towards Ln(III) ions were also investigated. 
  Reference    Z. Naturforsch. 53b, 1445—1454 (1998); received July 3 1998 
  Published    1998 
  Keywords    Template Synthesis, Lanthanide(III) Complexes, Oxaazamacrocycle, Schiff-Base, Ion Selectivity 
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 TEI-XML for    default:Reihe_B/53/ZNB-1998-53b-1445.pdf 
 Identifier    ZNB-1998-53b-1445 
 Volume    53 
7Author    Miki Hasegawa, Yasunori Yamada+, Ken-Ichi Kumagai, Toshihiko HoshiRequires cookie*
 Title    Electronic Structure of 2,6-Bis{./V-(2-hydroxyphenyl)immoinethyl}-4-methylphenol  
 Abstract    The electronic and molecular structure of 2,6-bis{/V-(2-hydroxyphenyl)iminomethyl}-4-methylphenol (hpimp) is clarified from the m easurements of electronic absorption and 'H NMR spectra in various solvents and an X-ray diffraction analysis, together with MO calcula­ tions. Electronic absorption bands of hpimp are at 422, 397.9, 359, 341, 294.3, 265.8, and 224 nm in the non-polar solvent cyclohexane. In polar solvents, such as methanol, an additional band which is assigned to a partly formed keto-am ine hpimp, is observed at 499 nm. From the ]H NM R spectra it is seen that hpimp exists in the enol-imine form in non-polar solvents, and as an equilibrium mixture of enol-imine and keto-amine forms in polar solvents. Each electronic absorption band of solid hpimp in a KBr disk is broadened compared with the solution state, and an additional band, again assigned to the keto-amine form, appears around 499 nm. A n X-ray diffraction analysis shows that hpimp assumes a keto-amine structure in the solid state, and forms a column structure along the c-axis. MO calculations suggest that the enol-imine hpimp has a twist structure around the two C -C single bonds, the twist angle being 100° to 120°. 
  Reference    Z. Naturforsch. 54b, 929—9 (1999); received January 8 1999 
  Published    1999 
  Keywords    Schiff Base, Electronic Structure Polarization Spectrum, X-Ray Data, MO Calculation 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-0929.pdf 
 Identifier    ZNB-1999-54b-0929 
 Volume    54 
8Author    Ümmühan Dodofp, Nurcan Özdemirb, Milka Karacanb, Ch, SpiroM. Georgievac, MiglenaE. Konstantinov0, Stefanova6Requires cookie*
 Title    Nicolay I  
 Abstract    Three novel Schiff bases: salicylaldehyde methanesulfonylhydrazone (1), 2-hydroxyaceto-phenone methanesulfonylhydrazone (2) and 2-hydroxy-1-naphthaldehyde methanesulfonylhy­ drazone (3) have been synthesized. Compounds 1-3, as well as acetone methanesulfonylhydra­ zone (4) have been characterized by TLC, 'H NMR and IR spectra. The spectroscopic results for 1-3 have revealed the presence of an intramolecular hydrogen bond between the hydroxyl group and the imine N atom. The conformational isomerism of 1-4 with respect to the rota­ tions around the SN and NN bonds have been studied by the method of molecular mechanics. Compounds 1-4 and methanesulfonylhydrazine exhibit antibacterial and cytotoxic effects. 
  Reference    Z. Naturforsch. 54b, 1553—1562 (1999); received July 31 1999 
  Published    1999 
  Keywords    Schiff Bases, Methanesulfonylhydrazine, 'H NMR Data, M olecular Mechanics, Cytotoxic Activity 
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 TEI-XML for    default:Reihe_B/54/ZNB-1999-54b-1553.pdf 
 Identifier    ZNB-1999-54b-1553 
 Volume    54