X-ray structural studies on metal complexes with nucleotides and pyridoxal-amino acid Schiff bases. Models for platinum binding to DNA and pyridoxal catalyzed reactions

1983 ◽  
Vol 92 (4-5) ◽  
pp. 485-495
Author(s):  
M. Damodara Poojary ◽  
S. P. Sudhakara Rao ◽  
H. Manohar
Keyword(s):  
Amino Acid ◽  
Metal Complexes ◽  
Schiff Bases ◽  
Structural Studies ◽  
X Ray ◽  
Catalyzed Reactions

scholarly journals X-Ray Structural Studies of Some Poly(α-amino acid)s with Hydrophobic Side Chains: Poly(L-valine), Poly(L-isoleucine), and Poly(L-phenylalanine)

1979 ◽  
Vol 11 (10) ◽  
pp. 763-774 ◽  
Author(s):  
Osamu Yamashita ◽  
Takashi Yamane ◽  
Tamaichi Ashida ◽  
Shinsuke Yamashita ◽  
Takuya Yamashita
Keyword(s):  
Amino Acid ◽  
Side Chains ◽  
Structural Studies ◽  
X Ray

Metallkomplexe mit biologisch wichtigen Liganden, CXV. Addition von α-Aminosäureestern an [CpFe(CO)3]+: Carbamoylkomplexe Cp(OC)2Fe-C(O)NHCHRCO2R’ und Kristallstruktur von Cp(OC)2Fe-C(O)NHCH2CO2Et / Metal Complexes of Biologically Important Ligands, CXV. Addition of α-Amino Acid Esters to [CpFe(CO)3]+: Carbamoyl Complexes Cp(OC)2Fe-C(O)NHCHRCO2R' and Crystal Structure of Cp(OC)2Fe-C(O)NHCH2CO2Et

1999 ◽  
Vol 54 (3) ◽  
pp. 385-388 ◽  
Author(s):  
Reinhold Urban ◽  
Kurt Polbom ◽  
Wolfgang Beck
Keyword(s):  
Crystal Structure ◽  
Amino Acid ◽  
Metal Complexes ◽  
Amino Acid Esters ◽  
X Ray Diffraction ◽  
Carbonyl Ligand ◽  
X Ray ◽  
Acid Esters

α-Amino acid esters can be added to a carbonyl ligand of [CpFe(CO)3]+CF3SO3- to give the carbamoyl complexes Cp(OC)2Fe-C(O)NHCHRCO2R′ (R = H, Me, CHMe2, CH2Ph; R′ = Et, Me). This type of reaction may be useful for the marking of peptides at the amino end. The crystal structure of Cp(OC)2Fe-C(O)NHCH2CO2Et was determined by X-ray diffraction.

Synthetic and structural studies on metal complexes of tripyrrin

2003 ◽  
Vol 07 (01) ◽  
pp. 17-24 ◽  
Author(s):  
Martin Bröring ◽  
Carsten D. Brandt ◽  
Serguei Prikhodovski
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Metal Ion ◽  
Coordination Geometry ◽  
Structural Studies ◽  
Structural Investigations ◽  
Coordination Polyhedra ◽  
X Ray ◽  
Step Procedure ◽  
Porphyrin Analogues

A general two-step procedure for the synthesis of metallotripyrrinates TrpyMOAc f with M = Co(II) , Cu(II) , Zn(II) and Pd(II) , and OAc f = trifluoroacetate, is described, starting from well-known monopyrrolic precursors and simple transition metal acetates. X-ray structural investigations were undertaken on four different complexes, and the results reveal, that the nature of the metal ion, rather than the ligand, determines the coordination geometry of these porphyrin fragment complexes. The finding of pseudotetrahedral and strained pseudoplanar coordination polyhedra at the metal centres makes a clear distinction between metalloporphyrins and metallotripyrrins and shows the latter to be related to some recently discovered metal chelates of macrocyclic porphyrin analogues.

Iron(II) and Nickel(II) Complexes of 2,6-Di(Thiazol-4-Yl)Pyridine and Related Ligands: Magnetic, Spectral and Structural Studies

1986 ◽  
Vol 39 (2) ◽  
pp. 209 ◽  
Author(s):  
AT Baker ◽  
HA Goodwin
Keyword(s):  
Solid State ◽  
Metal Complexes ◽  
Single Crystal ◽  
Coordination Sphere ◽  
Structural Parameters ◽  
Complex Cation ◽  
Magnetic Behaviour ◽  
Structural Studies ◽  
Thermally Induced ◽  
X Ray

2,6-Di(thiazol-4-yl)pyridine (1a), 2,6-di(2-methylthiazol-4-yl)pyridine (1b) and 2,6-di(2-phenylthiazol-4-yl)pyridine (1c) have been prepared by Hantzsch syntheses from 2,6-di(ω- bromoacetyl )pyridine and the appropriate thioamide. Bis ( ligand ) iron(II) and nickel(II) complexes of (1a) and (1b) have been prepared but no metal complexes of (1c) were isolated. The bis ( ligand ) iron(II) complexes of (1a) are low-spin whereas those of (1b) undergo thermally induced spin-transitions, both in the solid state and solution. The field strengths of the ligands , determined from the spectra of their nickel(II) complexes, correlate well with the observed magnetic behaviour of their iron(II) complexes. The structure of [FeL2][ClO4]2.H2O, L = (1a), was determined by single-crystal X-ray diffractometry . The complex cation has the meridional configuration with the ligand functioning as an approximately planar tridentate. The structural parameters relating to the Fe-N6 coordination sphere are remarkably similar to those found for bis (2,2′:6′, 2′- terpyridine )iron(II) bis ( perchlorate ) monohydrate.

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