Metallkomplexe mit Tetrapyrrol-Liganden, XVIII* Osmiumkomplexe des meso-Tetra(p-tolyl)porphyrins / Metal Complexes with Tetrapyrrole Ligands, XVIII* Osmium Complexes of meso-Tetra(p-tolyl)porphyrin

1977 ◽  
Vol 32 (12) ◽  
pp. 1439-1448 ◽  
Author(s):  
Johann W. Buchler ◽  
Manfred Folz
Keyword(s):  
Metal Complexes ◽  
Spectroscopic Characterization ◽  
Porphyrin Ligand ◽  
Osmium Complexes ◽  
Acceptor Capacity

The preparation and spectroscopic characterization of osmium tetra(p-tolyl)porphyrin complexes, Os(TTP)LL′ (2c-21; L or L′ = CO, N2, EtOH, THF, Py, PPh3, P(OMe)3, methoxide or oxide) are described. 2c-21 are compared with the analogous octaethylporphyrin complexes, 1c-11. In 2c-21, the porphyrin ligand is a stronger π-acceptor than in 1c-11. The π-acceptor capacity of the porphyrin ligand renders the dinitrogenosmium(II) porphyrins 1j or 2j less stable than the dinitrogenpentammineosmium(II) cation.

Metallkomplexe mit Tetrapyrrol-Liganden, XIX [1]. Synthese und elektrochemische Charakterisierung der Kohlenmonosulfid-Metalloctaethylporphyrine mit Eisen(II) oder Osmium(II) im Zentrum. Ein Beitrag zur "Bathochromie-Regel" / Metal Complexes with Tetrapyrrole Ligands, XIX [1]. Synthesis and Electrochemical Characterization of Thiocarbonyl Metallooctaethylporphyrins with Iron(II) or Osmium(II) in the Center. A Contribution to the "Rule of Bathochromism"

1978 ◽  
Vol 33 (12) ◽  
pp. 1371-1380 ◽  
Author(s):  
Johann W. Buchler ◽  
Wolfgang Kokisch ◽  
Paul D. Smith ◽  
Bernhard Tonn
Keyword(s):  
Metal Complexes ◽  
Linear Correlation ◽  
Optical Spectrum ◽  
Spectroscopic Characterization ◽  
Electrochemical Characterization ◽  
Redox Potentials ◽  
Acceptor Capacity ◽  
Α Band

The preparation and spectroscopic characterization of thiocarbonyl metalloporphyrins M(OEP)CS(L') (e.g. 2e: M = Fe, L' = Py, 1e: M = Os, L' = Py** are described. Especially noteworthy is the existence of a pentacoordinate, diamagnetic, air-stable heme Fe(OEP)CS (2f: M = Fe, no L′). A linear correlation of the α-band frequencies (expressed as ϋa) in the optical spectrum and the metal(II/III) redox potentials (E1/2) taken from cyclic voltam­metry experiments suggests (Abb. 3) that in complexes of the type M(OEP)LL' (1,2) λa is bathochromically shifted as the π-acceptor capacity of L increases (“Rule of Bathochromism”). The strong π-acceptor capacity of carbon monosulphide renders the attack of dioxygen to the thiocarbonyl heme unfavourable; O2 and CS seem to be comparable in their π-acceptor strength.

Far Infrared Spectroscopic Characterization of Sugars and their Metal Complexes

1997 ◽  
pp. 251-252
Author(s):  
Luqin Yang ◽  
Jinguang Wu ◽  
Qiao Zhou ◽  
Jiang Bian ◽  
Yanmin Yang ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Far Infrared ◽  
Spectroscopic Characterization ◽  
Infrared Spectroscopic

Research on Macro Cyclic Polyamine Complexes of Transition Metal and Catalytic Properties

2013 ◽  
Vol 850-851 ◽  
pp. 24-27
Author(s):  
Hong Lei
Keyword(s):  
Metal Complexes ◽  
Spectroscopic Characterization ◽  
Hydrolytic Activity ◽  
Macrocyclic Polyamine ◽  
Metal Chlorides ◽  
Carbohydrate Ligands ◽  
Coordination Ability ◽  
Important Significance ◽  
Hydrolysis Activity

This article Synthesis of carbohydrate ligands of coordination ability, to react with metal Chlorides to get more stable complexes, and elemental analysis, infrared, Ultraviolet Spectroscopic characterization and analysis of nuclear magnetic resonance. Characterization of its structure and study on the hydrolysis activity of pnitrophenyl picolinate lipid and the activity of pnitrophenol solution of phosphate, disodium macrocyclic polyamine catalyzed by macrocyclic polyamine metal complexes. The results show that the effect of hydrolytic activity of macrocyclic polyamine complexes is much larger than the hydrolysis activity of ordinary metal complexes; it can be important significance to find a better way of cutting nucleic acid by hydroxylation.

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