An NMR Study of Metal Complexes Containing Acetylacetone and Related Compounds. I. The Preparation, Halogenation and NMR Spectra of Cobalt(III) Complexes Containing Acetylacetone and Bis(acetylacetone)ethylenediimine

スポンサーリンク

概要

• 論文の詳細を見る

• A mixed cobalt(III) complex containing both bis(acetylacetone) ethylenediimine and acetylacetone anions, [Co(bean)(acac)] (bean=dianion of bis (acetylacetone) ethylenediimine, acac=anion of acetylacetone), was newly prepared and its electrophilic substitution reaction at the chelate ring protone was studied by means of NCS, NBS, and NIS (NCS, NBS and NIS are the abbreviated forms of <I>N</I>-chloro-, <I>N</I>-bromo- and <I>N</I>-iodosuccinimide). The structures of this complex, [Co(baen)-(acac)], and of the halogenated complex were both determined to be of the β-form (<I>cis</I> with respect to the coordinated two oxygen atoms of baen) on the basis of their NMR spectra. The ring protons of the imine chelates were found to be more reactive than that of the acetylacetone chelate in the chlorination reaction. Then, a bi-substituted complex, [Co(baen-Cl<SUB>2</SUB>)(acac)], in which two chlorine atonies were attached to the two imine chelate rings, was prepared. Tri-substituted complexes, [Co(baen-X<SUB>2</SUB>)(acac-X)] (X=Cl, Br and I), were also prepared. The quasiaromaticity of both the acetylacetone and imine rings was considered on the basis of their NMR spectra. A new complex, [Co(baen)(OH)(H<SUB>2</SUB>O)], was also prepared in order to assign the NMR spectrum of the complex, [Co(baen)(acac)]. The IR, UV, and visible absorption spectra were also considered.

• 公益社団法人 日本化学会の論文

著者

• Fujii Yuki

  Department Of Chemistry Faculty Of Science Ibaraki University

関連論文

• Effect of Triamine Ligands (L) on the Acidity of L-Zn-OH_2 as a Model Compound of CA and AP
• Synthesis of New Cationic Schiff Base Complexes of Copper(II) and Their Selective Binding with DNA
• Thermodynamic and Kinetic Studies of Zinc(II)-Triamine Complexes as Models of CA and AP
• Preparation of Palladium (II) and Copper (II) Selective Chelating Resin Bearing 2-Acetylphenol Ligand
• TES microcalorimeter SEM-EDS system for rare-earth elements analyses
• Cobalt(III) and Chromium(III) Complexes with Ethylenediaminemonoacetic Acid
• The stereochemistry and reactivity of metal-Schiff base complexes. II. High stereoselectivity in (1S,2S)-N,N'-1,2-cyclohexylenebis(salicylideneaminato)(sal2-(S,S)-chxn) cobalt(III) complexes with amino acids and the optical resolution of amino acids with
• Preparation, crystal structure, and stereochemical properties of {N,N'-ethylenebis(1,1,1-trifluoro-4-imino-2-pentanonato)} (L-methioninato)cobalt(III).
• The stereochemistry and reactivity of metal-Schiff base complexes. V. The solvent effect on the stereoselectivity of cobalt(III) complexes containing a sal2en-type Schiff base and L-amino acid.
• The stereochemistry and reactivity of metal-Schiff base complexes III. The kinetic and thermodynamic stereoselectivities in the formation of N,N'-ethylenebis(.ALPHA.-methylsalicylideneaminato)cobalt(III) complexes with L-proline,hydroxy-L-proline,and allo
• An NMR Study of Metal Complexes Containing Acetylacetone and Related Compounds. III. The Preparation and Determination of the Configurations of Cobalt(III) Complexes Containing N,N′-Ethylenebis(acetylacetonimine) and N,N′-Ethyl
• The crystal and molecular structure of (N-benzyl-L-alaninato)-(n,n'-ethylenebis(.ALPHA.-methylsalicylideneaminato))-cobalt(III) trihydrate.
• A Co-59 nuclear magnetic resonance study of the interaction of lanthanoid shift reagents with tris(.BETA.-diketonato)-cobalt(III) complexes.
• The stereochemistry and reactivity of metal-Schiff base complexes. VII. Contribution of hydrophobic interligand interaction to chiral recognition of phenylalaninate and tryptophanate with (1R,2R)-N,N'-disalicylidene-1,2-cyclohexanediaminecobalt(III) compl
• The stereochemistry and reactivity of metal-Schiff base complexes. VI. The kinetics and mechanism of isomerization between .DELTA.L-.BETA.2- and .LAMBDA.L-.BETA.2-diastereoisomers of N,N'-ethylenebis(.ALPHA.-methylsalicylideneaminato)cobalt(III) complexes
• Multidentate Ligand Substitution Reactions. XI. Substitution Reactions of Nickel(II) Complexes of Diethylenetriamine and Ethylenediaminemonoacetic Acid with Diethylenetriaminepentaacetic Acid and of Nickel(II) Complexes of Diethylenetriamine and Ethylened
• An NMR Study of Metal Complexes Containing Acetylacetone and Related Compounds. I. The Preparation, Halogenation and NMR Spectra of Cobalt(III) Complexes Containing Acetylacetone and Bis(acetylacetone)ethylenediimine
• The stereoselectivity of N,N'-ethylenebis(.ALPHA.-methylsalicylideneaminato)-cobalt(III) complexes with N-benzyl-L-alanine, N-methyl-L-alanine, and N-benzyl-N-methyl-L-alanine, and the stereospecificity of N,N'-1,2-cyclohexylenebis(salicylideneaminato)-co
• Stereochemistry and reactivity of metal-schiff-base complexes. I. Preparation and thermodynamic stereoselectivity of mixed ligand cobalt(III) complexes containing N,N'-ethylenebis(salicylideneamine) dianion (sal2en) or (7,7'-Me-sal2en) and L-amino acid an
• Nickel(II) Complexes of Ethylenediaminemonoacetic Acid (EDMA). The Preparation and Thermal Decomposition of Nickel(II)-EDMA Complexes
• The Polarography of N,N′-Ethylenebis(acetylacetoniminato) and N,N′-Ethylene bis(salicylaldehydeiminato) Complexes of Cobalt(III), Nickel(II), and Copper(II) in an N,N′-Dimethylformamide Solution
• Determination of the Optical Purity of Amino Acids by Complex Formation. Determination of Optimum Condition for Rotational Measurement
• Inversion of stereoselectivity by hydrophobic interligand interactions. Preparation, structure, and stereoselectivity of {N,N'-ethylenebis(1,1,1-trifluoro-4-amino-2-pentanonato)}(L-amino acidato)cobalt(III).

もっと見る 閉じる

スポンサーリンク