Coordination compounds of substituted 1,10-phenanthrolines and related bipyridyls. XII. Complexes of copper(I), silver(I), and nickel(II) with 2-Methyl-1,10-phenanthroline

1970 ◽  
Vol 23 (4) ◽  
pp. 699 ◽  
Author(s):  
EW Ainscough ◽  
RA Plowman
Keyword(s):  
Magnetic Susceptibility ◽  
Solid State ◽  
Coordination Compounds ◽  
Nickel Complexes ◽  
Hot Water ◽  
Conductivity Measurements ◽  
Hypophosphorous Acid ◽  
Dimeric Structure ◽  
Donor Nitrogen ◽  
Reflectance Measurements

Copper(1) salts of the type Cu(mep)2X (X = NO3, ClO4) (mep = 2-methyl- 1,l0-phenanthroline) were obtained by boiling the appropriate bis copper(11) complex in water or by reduction with hypophosphorous acid. They are expected to have a tetrahedral arrangement of donor nitrogen atoms about the copper(1) ion. Complexes Cu(mep)X (X = Br,I) were obtained by reduction of the appropriate copper(11) salt in hot water with hypophosphorous acid. These may be dimeric in the solid state with a tetrahedral arrangement of the ligand donor atoms. Complexes of the type Ag(mep)2X (X = NO3,ClO4) were prepared and are believed to be tetrahedrally coordinated. Ag(mep)Br was also prepared and in the solid state may be a dimeric structure involving the bromo ligand as the bridging unit. Nickel complexes of the type Ni(mep)X2 (X = Cl, NO3) and Ni(mep)2X2,yH2O (X = Cl, y = 4; X = NO3, y = �) were prepared and structures determined as far as possible by means of magnetic susceptibility and conductivity measurements, and by infrared and reflectance measurements.

Coordination compounds of substituted 1,10-Phenanthrolines and related dipyridyls. VII. Complexes of copper(I) and 4,6,4',6'-Tetramethyl-2,2'-bipyridine

1965 ◽  
Vol 18 (9) ◽  
pp. 1339 ◽  
Author(s):  
JR Hall ◽  
MR Litzow ◽  
RA Plowman
Keyword(s):  
Solid State ◽  
Physical Properties ◽  
Copper Atom ◽  
Coordination Compounds ◽  
Donor Nitrogen ◽  
Partial Dissociation

A number of diamagnetic complexes of copper(I) and 4,6,4',6'-tetramethyl-2,2'-bipyridine (tmb) have been prepared and some physical properties measured. The complexes of formula Cu(tmb)2X where X = NO3, ClO4, Br, and I behave as 1 : 1 electrolytes in nitrobenzene and nitromethane, while the complex Cu(tmb)2Cl,H2O apparently undergoes partial dissociation in these solvents. All are expected to have a tetrahedral arrangement of the four donor nitrogen atoms about the copper atom. The mono complexes CuXtmb, where X = Cl, Br, and I, appear to be dimeric in the solid state with halogen bridging, but in solution the chloro and bromo complexes rearrange to varying degrees depending on the solvent, forming the salt-type compounds [Cu(tmb)2][CuX2]. CuItmb is insoluble in all common solvents.

Spectroscopic studies of some Pd(II), Pt(II), Ag(I), and Au(III) complexes of 4,6-diamino-2-thiopyrimidine and 4,6-diamino-2-methylthiopyrimidine. Structure and binding site determination

1988 ◽  
Vol 66 (2) ◽  
pp. 249-255 ◽  
Author(s):  
M. D. Gutiérrez ◽  
R. López ◽  
M. A. Romero ◽  
J. M. Salas
Keyword(s):  
Magnetic Susceptibility ◽  
Solid State ◽  
Nmr Spectra ◽  
Spectroscopic Studies ◽  
Spectroscopic Techniques ◽  
Conductivity Measurements ◽  
Sulphur Atom ◽  
H Nmr ◽  
Ring Nitrogen ◽  
Ring Nitrogen Atom

Interaction of Pd(II), Pt(II), Ag(I), and Au(III) with 4,6-diamino-2-thiopyrimidine (DATP) and 4,6-diamino-2-methyl-thiopyrimidine (DAMTP) in aqueous medium resulted in the formation of new complexes which have been characterized by elemental analysis, ir, 1H-nmr spectroscopic techniques, magnetic susceptibility measurements in the solid state, and conductivity measurements in DMF solution. The ir and 1H-nmr spectra were consistent with coordination involving the non-protonated ring nitrogen atom, the exocyclic sulphur atom, or N,S-chelation.

Coordination compounds of substituted 1,10-phenanthrolines and related dipyridyls. X. Complexes of iron, cobalt, and nickel, and 4,6,4',6'-Tetramethyl-2,2'-bipyridine

1966 ◽  
Vol 19 (2) ◽  
pp. 201 ◽  
Author(s):  
JR Hall ◽  
MR Litzow ◽  
RA Plowman
Keyword(s):  
Magnetic Susceptibility ◽  
Absorption Spectra ◽  
Coordination Compounds ◽  
Conductivity Measurements ◽  
Visible Absorption ◽  
Iron Cobalt ◽  
Cobalt And Nickel

The following complexes of 4,6,4',6'-tetramethyl-2,2'-bipyridine (tmb) have been prepared: MCl2 tmb, where M = Fe, Co, and Ni; M(NO3)2 tmb,H2O, where M = Fe and Co; [CoNO3 tmb2]ClO4; and Ni tmb2 (NO3)2,H2O. The structures of these compounds have been determined, as far as possible, by means of magnetic susceptibility and conductivity measurements, and by studies of their infrared and visible absorption spectra.

scholarly journals Effect of Water and Ethanol Extracts from Hericium erinaceus Solid-State Fermented Wheat Product on the Protection and Repair of Brain Cells in Zebrafish Embryos

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3297
Author(s):  
Shun-Kuo Sun ◽  
Chun-Yi Ho ◽  
Wei-Yang Yen ◽  
Su-Der Chen
Keyword(s):  
Solid State ◽  
Brain Cell ◽  
Hot Water ◽  
Raw Material ◽  
Brain Cells ◽  
Zebrafish Embryos ◽  
Hericium Erinaceus ◽  
Water Extracts ◽  
The Brain ◽  
Wheat Product

Extracts from Hericium erinaceus can cause neural cells to produce nerve growth factor (NGF) and protect against neuron death. The objective of this study was to evaluate the effects of ethanol and hot water extracts from H. erinaceus solid-state fermented wheat product on the brain cells of zebrafish embryos in both pre-dosing protection mode and post-dosing repair mode. The results showed that 1% ethanol could effectively promote zebrafish embryo brain cell death. Both 200 ppm of ethanol and water extracts from H. erinaceus solid-state fermented wheat product protected brain cells and significantly reduced the death of brain cells caused by 1% ethanol treatment in zebrafish. Moreover, the zebrafish embryos were immersed in 1% ethanol for 4 h to cause brain cell damage and were then transferred and soaked in the 200 ppm of ethanol and water extracts from H. erinaceus solid-state fermented wheat product to restore the brain cells damaged by the 1% ethanol. However, the 200 ppm extracts from the unfermented wheat medium had no protective and repairing effects. Moreover, 200 ppm of ethanol and water extracts from H. erinaceus fruiting body had less significant protective and restorative effects on the brain cells of zebrafish embryos. Both the ethanol and hot water extracts from H. erinaceus solid-state fermented wheat product could protect and repair the brain cells of zebrafish embryos damaged by 1% ethanol. Therefore, it has great potential as a raw material for neuroprotective health product.

Synthesis of New Chalcogenide Materials. The Novel One-Dimensional Semiconductor K4 Ti3 S14

1987 ◽  
Vol 97 ◽  
Author(s):  
Steven A. Sunshine ◽  
Doris Kang ◽  
James A. Ibers
Keyword(s):  
Electrical Conductivity ◽  
Solid State ◽  
Alkali Metal ◽  
The Novel ◽  
Conductivity Measurements ◽  
One Dimensional ◽  
General Utility ◽  
Solid State Materials ◽  
Chalcogenide Materials

ABSTRACTThe use of A2 Q/Q melts (A - alkali metal, Q - S or Se) for the synthesis of new one-dimensional solid-state materials is found to be of general utility and is illustrated here for the synthesis of K4 Ti3 SI4. Reaction of Ti metal with a K2 S/S melt at 375°C for 50 h affords K4 Ti3 SI4. The structure possesses one-dimensional chains of seven and eightcoordinate Ti atoms with each chain isolated from all others by surrounding K atoms. There are six S-S pairs (dave - 2.069(3) Å) so that the compound is one of TiIV and may be described as K4 [Ti3 (S)2 (S2)6]. Electrical conductivity measurements indicate that this material is a semiconductor.

Formation of di- and polynuclear Mn(II) thiocyanate pyrazole complexes in solution and in the solid state

2018 ◽  
Vol 73 (11) ◽  
pp. 793-801
Author(s):  
Aleksej Jochim ◽  
Christian Näther
Keyword(s):  
Solid State ◽  
Coordination Compounds ◽  
Magnetic Measurements ◽  
Metal Cations ◽  
Chain Compound ◽  
Pyrazole Ligands

AbstractReaction of Mn(NCS)2with pyrazole leads to the formation of three compounds with the compositions Mn(NCS)2(pyrazole)4(1), [Mn(NCS)2]2(pyrazole)6(2) and Mn(NCS)2(pyrazole)2(3). Compound1, already reported in the literature, consists of discrete complexes, in which the Mn(II) cations are octahedrally coordinated by four pyrazole ligands and two terminally N-bonded thiocyanate anions. In compound2each of the two Mn(II) cations are coordinated octahedrally by three pyrazole ligands and one terminal as well as two bridging thiocyanate anions, which link the metal cations into dimers. In compound3also octahedrally coordinated Mn(II) cations are present but they are linked into chainsviacentrosymmetric pairs ofμ-1,3-bridging thiocyanate anions. Upon heating compound1loses the pyrazole co-ligands stepwise and is transformed into the chain compound3viathe dimer2that is formed as an intermediate. Magnetic measurements on compounds2and3reveal dominating antiferromagnetic interactions, as already observed for 1D Mn(NCS)2coordination compounds with pyridine based co-ligands.

The decomposition mechanism of new solid-state 4(5)-aminoimidazole-5(4)-carboxamide coordination compounds

2004 ◽  
Vol 409 (2) ◽  
pp. 145-150 ◽  
Author(s):  
S. Materazzi ◽  
S. Aquili ◽  
C. Bianchetti ◽  
G. D’Ascenzo ◽  
K.M. Kadish ◽  
...  
Keyword(s):  
Solid State ◽  
Coordination Compounds ◽  
Decomposition Mechanism
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