EVIDENCE FOR A BOND RUPTURE MECHANISM IN TRANS-TO-CIS ISOMERIZATION OF [CrCl2bn2]Cl·HCl·2H2O IN SOLID-PHASE

1977 ◽  
Vol 6 (4) ◽  
pp. 339-344 ◽  
Author(s):  
Ryokichi Tsuchiya ◽  
Tadatsugu Yoshikuni ◽  
Shigeo Nakagawa ◽  
Akira Uehara ◽  
Eishin Kyuno
Keyword(s):  
Solid Phase ◽  
Bond Rupture ◽  
In Trans ◽  
Rupture Mechanism

Studies of cobalt(III) complexes of thiosemicarbazide

1970 ◽  
Vol 48 (15) ◽  
pp. 2327-2333 ◽  
Author(s):  
Kenneth K. W. Sun ◽  
Roland A. Haines
Keyword(s):  
Optically Active ◽  
Optical Rotatory Dispersion ◽  
Bond Rupture ◽  
Ionic Form ◽  
Optical Rotatory ◽  
Geometric Isomers ◽  
Complex Ions ◽  
Active Complex ◽  
Cis And Trans ◽  
Rupture Mechanism

cis and trans geometric isomers of low spin octahedral cobalt(III) complexes containing either thiosemicarbazide (Htsc) or its anion (tsc) have been prepared and electronic spectra are presented and discussed. For the ionic form [Co(Htsc)3]3+ both isomers were resolved and absolute configurations were assigned on the basis of optical rotatory dispersion and circular dichroism measurements. The interconversion of these optically active complex ions in aqueous solution was studied and a bond rupture mechanism is proposed to account for the observed inversion and isomerization.

Solid–Solid Phase Transitions in [trans-Pt(PMe3)2(C≡CC6H4R)2]-Containing Materials (R = O(CH2)nH; n = 6, 9, 12, and 15)

2018 ◽  
Vol 37 (15) ◽  
pp. 2544-2552 ◽  
Author(s):  
Gabriel Marineau Plante ◽  
Daniel Fortin ◽  
Armand Soldera ◽  
Pierre D. Harvey
Keyword(s):  
Phase Transitions ◽  
Solid Phase ◽  
In Trans

The α(C—C)/β(C—H) ratio of the primary processes in the 184.9 nm photolysis of gaseous cis- and trans-2-butene

1987 ◽  
Vol 65 (7) ◽  
pp. 1631-1638 ◽  
Author(s):  
Hélène Deslauriers ◽  
Wlodzimiercz Makulski ◽  
Guy J. Collin
Keyword(s):  
Quantum Yield ◽  
Gas Phase ◽  
Molecular Property ◽  
Bond Rupture ◽  
Complete Study ◽  
Yield Values ◽  
In Trans ◽  
Cis And Trans ◽  
In Cis

A complete study of the 184.9 nm photolysis of cis- and trans-2-butene has been done in the gas phase. The main primary processes (>90%) are the α(C—C) and β(C—H) bond ruptures. Both processes have similar quantum yield values in cis-2-butene: [Formula: see text]. Conversely, the α(C—C) bond rupture is more important in trans-2-butene: [Formula: see text]. These values are compared with those measured in propene (0.57) and isobutene (0.95). No simple molecular property seems sufficient to explain such an effect.

Thermal reaction of the U(VI) and Th(IV) 8-hydroxyquinoline adducts

1969 ◽  
Vol 47 (8) ◽  
pp. 1435-1437 ◽  
Author(s):  
A. Corsini ◽  
J. Abraham
Keyword(s):  
Thermal Energy ◽  
Ligand Exchange ◽  
Solid Phase ◽  
Thermal Reaction ◽  
Bond Rupture ◽  
Exchange Equilibrium ◽  
Metal Ligand ◽  
Ligand Bond

The use of [14C]-8-hydroxyquinoline has shown that when the 8-hydroxyquinoline adducts, [Formula: see text] and Th(C9H6NO)4•C9H7NO, are thermally converted to the normal compounds, UO2(C9H6NO)2 and Th(C9H6NO)4, intermolecular ligand exchange in the solid phase occurs. The extent to which the exchange equilibrium proceeds suggests that the thermal energy absorbed is sufficient to promote considerable metal–ligand bond rupture.

A study of the Szilard-Chalmers reaction of ethyl iodide at low thermal neutron fluxes

1971 ◽  
Vol 24 (1) ◽  
pp. 25 ◽  
Author(s):  
BJ Brown ◽  
DJ Carswell
Keyword(s):  
Thermal Neutron ◽  
Neutron Irradiation ◽  
Solid Phase ◽  
Chemical Exchange ◽  
Irradiation Time ◽  
Iodine Concentration ◽  
Ethyl Iodide ◽  
Bond Rupture ◽  
Post Irradiation ◽  
Free Iodine

Results reported in this paper show that the simple interpretation of the Szilard-Chalmers reaction in ethyl iodide, viz. bond rupture of the radiohalide and absence of subsequent chemical exchange, is not entirely valid. The results also verify and explain the apparently anomalous radiohalide yield of zero for neutron irradiation of pure ethyl iodide in the absence of a γ flux. ��� At low neutron fluxes free radiohalide yields in the liquid phase have been shown to be a function of irradiation and post-irradiation time, γ pre-irradiation dose, and fast/thermal neutron ratio. These results are consistent with the hypothesis that exchange occurs at a rate which decreases as the free iodine concentration increases. ��� Neutron irradiation of ethyl iodide at 77�K produces radioactive iodine in a metastable free state which does not undergo recombination in the frozen solid phase. The rate of post-irradiation recombination between free iodine-128 and the thawed liquid organic phase is independent of irradiation time and was found to be significantly faster than the rate corresponding to neutron irradiation at room temperature.

Solid-phase immunoelectron microscopy for rapid diagnosis of enteroviruses

1984 ◽  
Vol 42 ◽  
pp. 226-227 ◽  
Author(s):  
K. Pegg-Feige ◽  
F. W. Doane
Keyword(s):  
Electron Microscopy ◽  
Cell Culture ◽  
Immunoelectron Microscopy ◽  
Detection Method ◽  
Solid Phase ◽  
Protein A ◽  
Plant Viruses ◽  
Rapid Diagnosis ◽  
Virus Diagnosis ◽  
Antiviral Antibody

Immunoelectron microscopy (IEM) applied to rapid virus diagnosis offers a more sensitive detection method than direct electron microscopy (DEM), and can also be used to serotype viruses. One of several IEM techniques is that introduced by Derrick in 1972, in which antiviral antibody is attached to the support film of an EM specimen grid. Originally developed for plant viruses, it has recently been applied to several animal viruses, especially rotaviruses. We have investigated the use of this solid phase IEM technique (SPIEM) in detecting and identifying enteroviruses (in the form of crude cell culture isolates), and have compared it with a modified “SPIEM-SPA” method in which grids are coated with protein A from Staphylococcus aureus prior to exposure to antiserum.

Application of solid-phase immune electron microscopy to study physical and stability characteristics of enterically transmitted non-a, non-b hepatitis virus

1988 ◽  
Vol 46 ◽  
pp. 80-81
Author(s):  
Charles D. Humphrey ◽  
E. H. Cook ◽  
Karen A. McCaustland ◽  
Daniel W. Bradley
Keyword(s):  
Electron Microscopy ◽  
Hepatitis A ◽  
Hepatitis A Virus ◽  
Solid Phase ◽  
Etiologic Agent ◽  
World Health ◽  
Health Concern ◽  
Morphological Identification ◽  
Immune Electron Microscopy

Enterically transmitted non-A, non-B hepatitis (ET-NANBH) is a type of hepatitis which is increasingly becoming a significant world health concern. As with hepatitis A virus (HAV), spread is by the fecal-oral mode of transmission. Until recently, the etiologic agent had not been isolated and identified. We have succeeded in the isolation and preliminary characterization of this virus and demonstrating that this agent can cause hepatic disease and seroconversion in experimental primates. Our characterization of this virus was facilitated by immune (IEM) and solid phase immune electron microscopic (SPIEM) methodologies.Many immune electron microscopy methodologies have been used for morphological identification and characterization of viruses. We have previously reported a highly effective solid phase immune electron microscopy procedure which facilitated identification of hepatitis A virus (HAV) in crude cell culture extracts. More recently we have reported utilization of the method for identification of an etiologic agent responsible for (ET-NANBH).

Identification of hepatitis a virus in cell cultures by solid phase immune electron microscopy

1986 ◽  
Vol 44 ◽  
pp. 238-239
Author(s):  
C.D. Humphrey ◽  
T.L. Cromeans ◽  
E.H. Cook ◽  
D.W. Bradley
Keyword(s):  
Electron Microscopy ◽  
Liquid Phase ◽  
Cell Cultures ◽  
Rapid Detection ◽  
Hepatitis A ◽  
Hepatitis A Virus ◽  
Solid Phase ◽  
Immune Electron Microscopy ◽  
Detection And Identification

There is a variety of methods available for the rapid detection and identification of viruses by electron microscopy as described in several reviews. The predominant techniques are classified as direct electron microscopy (DEM), immune electron microscopy (IEM), liquid phase immune electron microscopy (LPIEM) and solid phase immune electron microscopy (SPIEM). Each technique has inherent strengths and weaknesses. However, in recent years, the most progress for identifying viruses has been realized by the utilization of SPIEM.

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