Copper porphine

Table II gives calculated results for copper porphine and experimental values for copper tetraphenylporphine. Results at the non-relativistic limit (c = >) were obtained from the same program by setting the speed of light to a very large number (10 a.u.) ...

Ard " and Gladkov and Solovyov propose, from normal coordinate calculations performed for the copper porphin complex, that bands near 368, 234 and 206 cm contain important contributions of the vCuN mode. From a vibrational study on the non-macrocycle phenantroline copper complexes it has been proposed the vCuN modes near 410 and 288 cm In bipyridine complexes of Cu(II), the vCuN mode is proposed at 297cm " a similar assignment is proposed in bipyrimidine complexes. ... 

A normal coordinate analysis (NCA) for hexazacyclophane Cu(II) complex was performed by using the Wilson s force field geometrical matrix (FG) method . An INDO/1 optimized molecular geometry was used to build the G matrix . The CuN distance is 1.84 A for the copper atom in the macrocycle plane this bond length is relatively short in comparison to that reported for the non-macrocycle tris-(l,10-phenantroline)Cu(II) (2.1 A) the planar macrocycles copper porphin (2.031 and tetraazacyclotetradecane Cu(II) derivatives (2.08... 

Susi, H. and J.S. Ard (1977). A valence force field for nickel porphin and copper porphin. Spectrochim. Acta A 33, 561. 

Sarma, Y.A. (1987). In plane vibrations of copper porphins. Spectrochim. Acta A 43, 1337. 

Copper Phthalocyanine Blue is the copper(II) complex of tetraazatetrabenzo-porphine. As shown below, the mesomeric structures indicate that all of the pyrrole rings simultaneously contribute to the aromatic system ... 

Parameter Copper tetra-phenylporphin Copper tetra-phenyl(pival-amido) porphin Tetramethyl ether of copper hemato-IX porphyrin... 

In order to increase the solubility of porphyrin and phthalocyanine complexes, several structural modifications have been made, a, jS, y, 6-Tetra-(4-pyridyl)-porphin complexes of copper(II), nickel(II), and zinc(II) have been synthesized (35) and their ultraviolet spectra determined in chloroform and in acid solution. By utilizing sulfonic acid groups to increase solubility, complexes of 4,4, 4",4" -tetrasulfophthalocyanine complexes of many metals were prepared (94j 95). This chelating agent was found to have a ligand field strength comparable to cyanide (94y 95). 

The porphyrin metallo complexes in crude oils, asphaltenes and other natural bitumens are chiefly those of vanadium and nickel although copper, iron and even uranium have been suggested. Recently in a Precambrian shale, porphins were found to chelate with iron, zinc and copper in addition to vanadium and nickel.The origin of these complexes is still uncertain, although several theories have been advanced. Some of these theories could be verified or possibly even disproved if the porphyrin type bound to each metal was known. Furthermore, since these heavy metals are harmful to both health and catalysts, a systematic study of demetallation of metalloporphyrins should prove useful. 

Porphlne (porphyrin). 21W,23//-Porphine, C20H14N4, Mr 310.36, formula, see porphyrins. Dark red cryst., mp. >360 °C (decomp.), soluble in pyridine. R forms salts of, e.g., iron, magnesium, and copper. It is the parent compound of all porphyrins, the respiratory pigments of animals and plants. 

The PtS network consists of equal numbers of tetrahedral and square-planar centers. Two such networks interpenetrate in the structure of [ Cu (tcp) Cu ]BF4-I7C6H5NO2 [Cu (tcp) = 5,10,15,20-tetrakis(4-cyano-phenyl)-21H,23H-porphine copper(II)]. The networks interpenetrate in an asymmetric fashion, i.e., the second net does not lie in the center of the channels and cavities of the first, but rather lies to one side. Attractive internet porphyrin... porphyrin interactions are the likely cause, and it produces larger channels and cavities, which contain large amounts of essentially liquid solvent, than would normally be expected. 

The adsorption of vanadyl-5,14, 23, 32-tetraphenyl-2, 3-naphthalocyanine VOTPNPc and vanadyl-5,10,15, 20-tetraphenyl-21H,31H-porphine VOTPPORP macrocycles onto metallic surfaces has been studied by Carrasco et al . A weak adsorbate-substrate interaction and no significant structural modifications imposed by surface effect were inferred from the IR spectra of the compounds deposited onto a KBr monocrystal and onto a smooth copper surface. 

Miscellaneous Metal Ions.—Mention has been made already of a relatively slow formation reaction for the normally labile manganese(ii) ion. Incorporations of the labile bivalent metal ions zinc(ii), copper(ii), manganese(n), cobalt(ii), and nickel(n) into water-soluble porphyrin molecules such as tetrakis-(4-N-methyI-pyridyl)porphine, tetrasulphonated tetraphenylporphine, and uroporphine are also relatively slow reactions. However, by taking into account the porphyrin deformation which is necessary, an Id mechanism can be fitted to these reactions. The rates of formation and dissociation of nickel(ii), copper(n), cobalt(ii), and zinc(ii) complexes of the sterically hindered ligand 1,4,8,11-tetramethyl-1,4,8,11-tetra-azacyclotetra-decane (Meicyclam) are also 10 —10 smaller than is normal for these metal ions. ... 

Yoshimoto, S. Tada, A. Suto, K. Narita, R. Itaya, K. 2003. Adlayer structure and electrochemical reduction of 0-2 on self-organized arrays of cobalt and copper tetraphenyl porphines on a Au(lll) surface. Langmuir 19 672-677. 

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