Optical resolution of rac-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (L),circular dichroism spectra of Ni(II) complexes with the active ligand,and the absolute configuration of (-)589-({Ni(SS-L)}2(d-tart)(H2O))(ClO4)22H2O as determined by
スポンサーリンク
概要
- 論文の詳細を見る
The title ligand (L) has been resolved through its <I>d</I>-tartrato-nickel(II) complex. The X-ray analysis shows that the less-soluble (−)<SUB>589</SUB>-diastereomer has a dimer structure with the folded macrocycles, [{NiL}<SUB>2</SUB>(<I>d</I>-tart)(H<SUB>2</SUB>O)](ClO<SUB>4</SUB>)<SUB>2</SUB>·2H<SUB>2</SUB>O, and that the chiral carbon atoms have the absolute configuration of <I>S</I>. Axial methyl groups of geminal dimethyl pairs of each nickel (II) complex in the dimer provide stereoselective environment for the coordination site of the <I>d</I>-tartrate ion. Stereospecific hydrogen-bonds between a secondary amine group of the macrocyclic ligand or coordinated water and hydroxyl or carboxyl oxygens of the <I>d</I>-tartrate ion play also an important role in the optical resolution. Pairs of enantiomers of the free ligand and three isomers of the four-coordinate nickel(II) complex have been isolated. Circular dichroism spectra of various four- and six-coordinate complexes with the optically active ligand have been described.
- 公益社団法人 日本化学会の論文
著者
-
Fujita Junnosuke
Division Of Natural Sciences International Christian University
-
Ito Tasuku
Division of Applied Molecular Science, Institute for Molecular Science
-
Ito Haruko
Division of Applied Molecular Science, Institute for Molecular Science
-
Toriumi Koshiro
Division of Applied Molecular Science, Institute for Molecular Science
関連論文
- Interconversion between Polymeric Orange and Monomeric Green Forms of a Schiff Base-Oxovanadium(IV) Complex
- A Pair of Seven-Coordinate Oxorhenium Complexes : [Re^O(tpen)]^ and [Re^VO(tpen)]^ (tpen=N, N, N', N'-Tetrakis(2-pyridylmethyl)ethylenediamine)
- Synthesis and Crystal Structure of Bis-(1,1,1-tris(dimethylphosphinomethyl)ethane)iron(II) Tetrafluoroborate Dihydrate
- Preparation and Stereochemistry of Cobalt(III) Complexes Containing 2, 2'-Bipyridine 1, 1'-Dioxide
- Isomerization of a Diastereomeric Oxovanadium(IV) Complex Containing an Unsymmetrical Tetradentate Schiff Base Ligand Catalyzed by Oxovanadium(V) Species
- Green and Orange Crystalline Forms of [VO{N-salicylidene-N'-3-ethoxysalicylidene-(R,R)-1,2-cyclohexanediamine}], Separation of the Diastereomeric Pair, and Isomerization between Them in the Soild State
- Prepartion and Characterization of Mononuclear Palladium(II) and Dinuclear Palladium(I) Complexes Containing a New Phosphine-Imine-Type Didentate Ligand, 8-(Dimethylphosphin) quinoline (Me_2Pqn). Molecular Structures of cis-[Pd(Me_2Pqn)_2](BF_4)_2 and [Pd
- Preparation and Resolution of a Series of Cobalt(III) Complexes Containing 2,2'-Biimidazole and Ethylenediamine
- Isomerization and Racemization of the Tris(4,4'-dimethoxy-or 4,4'-diethoxy-2,2'-bipyridine 1,1'-dioxide)chromium(III)Complexes
- Synthesis and Characterization of trans[CoCl_2(232N_4x)]^+(232N_4x=1,4,8,11Tetraazacyclopentadecane, -cyclohexadecane, -cycloheptadecane, -cyclooctadecane, -cyclononadecane, -cycloicosane, -cyclohenicosane, and -cyclotricosane)
- An important metal complex in the asymmetric synthesis of .ALPHA.-amino acids. The crystal and molecular structure of (-)546-((R)-alaninato)((6R,8R)-6,8-dimethyl-2,5,9,12-tetraazatridecane)cobalt(III) bromide trihydrate, (-)546-(Co(R-ala)(1,5R,7R,11-Me4-2
- Photochemistry of metal-metal bonded compounds. I. Isolation and X-ray molecular structure analyses of orthometalated triphenyl phosphite manganese carbonyl derivatives and reaction mechanisms of orthometalation from photodegradation of manganese carbonyl
- Preparation and molecular structure of cis-.BETA.,trans(sec-N,P)-{(2-aminoethyl)dimethylphosphine}(3,7-diazanonane-1,9-diamine)cobalt(III) bromide dihydrate.
- Preparation and characterization of (CoX2(edpp)2)+(edpp=NH2CH2CH2P(C6H5)2,X=Cl-,Br-,I-,NCO-,NCS-,N3-,NO2-) and (CoX2(en)(dppe))+(en=NH2CH2CH2NH2,dppe=(C6H5)2PCH2CH2P(C6H5)2,X=Cl-,Br-,NCS-). Crystal structures of trans(NCS,NCS),cis(P,P)-(Co(NCS)2(edpp)2)Br
- Preparation and molecular structure of cis-diaqua((7S, 14S)-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclo-tetradecane)nickel(II) chloride.
- Reactions of metal complexes with carbohydrates. Synthesis and structure of (2-((2-aminoethyl)amino)-2-deoxy-L-sorbose)(ethylenediamine)nickel(II) dichloride hemi methanol solvate: (Ni(en)(L-sor-en))Cl21/2CH3OH(en=ethylenediamine and sor=sorbose).
- Isomerism of the metal complexes containing multidentate ligands. IX. structure of the meso isomer of (Co(hexaen))3+ (hexaen=1,4,7,10,13,16-hexaazacyclooctadecane)
- Optical resolution of rac-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (L),circular dichroism spectra of Ni(II) complexes with the active ligand,and the absolute configuration of (-)589-({Ni(SS-L)}2(d-tart)(H2O))(ClO4)22H2O as determined by