bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthetic Studies on the Ochtodane Type Terpenes I. Stereoselective Construction of the Ochtodane Skeleton from Myrcene
Authors: Masaki Yukio , Hashimoto Kinji , Sakuma Kazuhiko , Kaji Kenji 
Published: July 2006

Abstract
The ochtodane skeleton, the Carbon framework of 1,1-dimethyl-3-ethylcyclohexane (1) was constructed highly stereoselectively by the acid-catalyzed (SnCl4 or CF3CO2H) cyclization of the terminally functionalized myrcene derivatives, the benzenesulfenyl chloride adduct (7), the terminal β-hydroxy sulfide (8) derived from 7, and myrcene 6,7-epoxide (10). The stereoselectivity of the 3-exo-double bond in 1 formed concomitantly in the cyclization reaction was found to depend remarkably upon the reaction temperature and the 85–94% of E-stereoselectivity was attained at −78 °C. By the method, the ochtodane derivatives with the sulfur- or oxygen-functional groups on the C(6)-position were obtained. Synthetic applications of the ochtodane type compounds (12) and (19) to the aldehyde component (4) of the pheromone of the male boll weevils and to an ochtodane type terpene (26) isolated from the red alga Octodes crockeri, are reported.
Synthetic Studies on the Ochtodane Type Terpenes II. Synthesis of Pleraplysillin-1
Authors: Masaki Yukio , Hashimoto Kinji , Serizawa Yuzuru , Kaji Kenji 
Published: July 2006

Abstract
A furyl sesquiterpene pleraplysillin-1 (1), which possesses the ochtodane skeleton (2) in the molecule, was synthesized regio- and stereoselectively starting from the ochtodane type monoterpene (5). Two approaches were investigated: One is the route by way of the benzenesulfenyl chloride addition to a sesquiterpene (9) or (13) which involve the whole carbon framework of 1 and the exocyclic E- or Z-double bond, and the other involves the regioselective formation of the endocyclic double bond of the ochtodane synthon (15) utilizing the hydroxylassisted epoxide opening reaction followed by homologation with the 3-furylmethyl moiety. In both of the routes the geometry of the exocyclic double bond of the ochtodane synthon played an important role in the regioselective formation of the endocyclic double bond in 1.
Preparation and ESR Studies of New Stable Tocopheroxyl Model Radicals
Authors: Mukai Kazuo , Takamatsu Kimiko , Ishizu Kazuhiko 
Published: July 2006

Abstract
New tocopherol (vitamin E) model compounds (tocopherol 1; 7-t-butyl-2,2-dimethyl-6-chromanol, tocopherol 2; 7-t-butyl-2,2,5-trimethyl-6-chromanol, and tocopherol 3; 5,7-diisopropyl-2,2-dimethyl-6-chromanol) have been synthesized by condensation of 2-methyl-3-buten-2-ol to the corresponding alkylhydroquinone. Electron spin resonance measurements were performed for the tocopheroxyl radicals obtained from the above tocopherol model compounds by oxidizing the phenol precursors with PbO2 in toluene. The proton hyperfine coupling constants and giso-values were determined. The tocopheroxyl radicals 2 and 3 having large alkyl substituents at both ortho positions (C-5 and C-7) are fairly stable, and the radical stability, as measured by the intensities of the ESR signals, increases in the order tocopheroxyl 1&lt;α-tocopheroxyl model&lt;tocopheroxyl 2&lt;tocopheroxyl 3. The result suggests that the in vitro antioxidant activities of tocopherols 2 and 3 are higher than that of α-tocopherol model.
The Mechanism and Stereochemistry of Asymmetric Transformation via Chiral Oxazolines
Authors: Shibata Saizo , Matsushita Hajime , Kaneko Hajime , Noguchi Masao , Sakurai Takao , Saburi Masahiko , Yoshikawa Sadao 
Published: July 2006

Abstract
The stereoselectivity of asymmetric transformation of 2-substituted alkanoic acids via oxazolines was clarified by measuring the isomeric ratio of 13C-labeled lithio oxazolines by 13C NMR. The mechanism of the process was discussed from substituent effects of the oxazoline ring and solvent effects on the transformation.
Steric and Electronic Effects of Unidentate Tertiary Phosphine Ligands on Chemical and Absorption Spectral Properties of Their Mixed Cobalt(III) Complexes with Acetylacetonate Ions
Authors: Katoh Katsuaki , Sugiura Hirofumi , Kashiwabara Kazuo , Fujita Junnosuke 
Published: July 2006

Abstract
A large number of new unidentate tertiary phosphine–cobalt(III) complexes containing acetylacetonate ions were prepared. The complexes are grouped into four types; (A) cis- and trans-([Co(acac)2(PRnPh3−n)2]+, (B) trans-[Co(acac)2(H2O)(PRnPh3−n)]+, (C) trans-[Co(acac)2(L)(PMe2Ph)n+, and (D) trans-(P,P)-[Co(acac)(CN)2(PRnPh3−n)2] (acac: acetylacetonate ion, R: CH3(Me), C2H5(Et), n-C3H7(Pr), i-C3H7(Pri), n-C4H9(Bu), i-C4H9(Bui), c-C6H11 (Cy), Ph: C6H5, L: NH3, CH3NH2, C5H5N(py), NCS−). The complexes of type A form cis and trans isomers in a different ratio depending upon the bulkiness and basicity of a phosphine ligand, and the ratios for the complexes with R=Me and Et were examined in some detail. The trans isomers of type A show a strong absorption band in the d-d transition region, which is assumed to involve charge transfer transitions between the cobalt(III) ion and a phosphine ligand, while the cis isomers exhibit the first d-d band split into two components with medium intensity. The complexes of type B show a distinct peak of the first d-d band, the energy shifts of which were discussed in terms of the bulkiness and basicity of phosphine ligands. The complexes of types C and D were prepared to compare the chemical and absorption spectral properties with those of complexes of types A and B.
Solvent Extraction of Copper(II) with 2-(o-Hydroxyphenyl)benzothiazole
Authors: Shimizu Kenji , Furuhashi Akiko 
Published: July 2006

Abstract
Equilibrium and kinetic aspects of the solvent extraction of Cu(II) with 2-(o-hydroxyphenyl)benzothiazole have been carried out using a water–chloroform system. The complex extracted into chloroform was greenish-brown in color and the absorbance at 490.0 nm obeyed Beer’s law up to 2×10−4 mol/dm3. The complex was 1 : 2 (Cu2+ : ligand) type and the over-all stability constant, β2, was 1.3×1017 at an ionic strength of 0.3. The extraction constant, Kex, was 2.5×10−8. The extraction kinetics were first order with Cu(II) ions and the reagent anions. The rate constant for the reaction was found to be 5.0×109 mol−1 min−1.
Five-coordinate Bis(1,1,1,5,5,5-hexafluoro-2,4-pentanedionato)(tertiary phosphine)palladium(II) and -platinum(II) Complexes. X-Ray Crystal and Molecular Structures and Fluxional Motions in Solution
Authors: Okeya Seichi , Miyamoto Toshiko , Ooi Shun’ichiro , Nakamura Yukio , Kawaguchi Shinichi 
Published: July 2006

Abstract
Five-coordinate complexes [M(hfac)2L] (M=Pd, Pt; hfac=1,1,1,5,5,5-hexafluoro-2,4-pentanedionate anion) were produced by the reactions of [M(hfac)2] with equimolar amounts of tertiary phosphines, phosphites, and triphenylarsine. They were characterized by 1H, 13C, 19F, and 31P NMR spectra in solution and several complexes containing bulky phosphines as L were isolated, and structures of [Pd(hfac)2{P(o-tolyl)3}] and [Pt(hfac)2{P(cyclohexyl)3}] were determined by X-ray analysis. Both complexes have very distorted square-pyramidal structures, one of the two hfac anions in either of them spanning the apical and basal coordination sites. NMR spectra at various temperatures disclosed the fluxional behaviors of these complexes which retain the solid-state structures at such low temperatures as −60 °C. Two kinds of twist mechanisms were proposed.
Cyclodienones. X. Reaction of Halo-cyclohexadien-1-ones with Phenols in the Presence of α-Picoline and Preparation of 4-Hydroxy- and 2-Hydroxyphenyl Aryl Ethers
Authors: Tashiro Masashi , Itoh Takashi , Fukata Gouki 
Published: July 2006

Abstract
Reaction of 4-halocyclohexadienones such as 4-bromo-(1a), 4-chloro-2,4,6-tri-t-butyl-(1b), 2,4-dichloro-4,6-di-t-butyl-2,5-cyclohexadien-1-one, and 2,4-dichloro-2,6-di-t-butyl-3,5-cyclohexadien-1-one with phenols in the presence of α-picoline was carried out under various conditions. The reaction of 1a and 1b with phenols afforded the corresponding 2-aryloxy-4,6-di-t-butyl phenols together with various by-products. The AlCl3-catalyzed trans-t-butylation of 2-aroxy-4,6-di-t-butyl-phenols, which were obtained by the above reaction, afforded the corresponding 2-hydroxyphenyl aryl ethers. The similar reaction of 4-aroxy-2,4,6-tri-t-butyl-2,5-cyclohexadien-1-ones also afforded the corresponding 4-hydroxyphenyl aryl ethers.
Ylide–Metal Complexes. VIII. The Preparation and Properties of Metal (Cu, Ag, Au, Zn, Cd, Hg, Ge, Sn, Pb, Pd, and Pt) Complexes with Methylenetris(dimethylamino)phosphorane
Authors: Yamamoto Yoshihisa 
Published: July 2006

Abstract
Bis[methylenetris(dimethylamino)phosphorane]metal chlorides,[(Me2N)3PCH2–M–CH2P(NMe2)3]Cln(M: Cu, Ag, Au, Zn, Cd, Hg; n: 1 or 2), have been isolated from a reaction mixture of methylenetris(dimethylamino)phosphorane (Me2N)3P=CH2 (L) and CuCl, AgCl, (C6H5)3PAuCl, ZnCl2, CdCl2, or HgCl2 in the mole ratio of 2:1 or 3:1. The reactions of L with R3MCl (M: Sn, Pb; R: Me, C6H5) in the mole ratio 1:1 yield new monomeric compounds of [methylenetris(dimethylamino)phosphorane]trimethyl(or triphenyl)metal chloride, [(Me2N)3PCH2–MR3]Cl. The reactions of L with PdCl2 or PtI4 in the mole ratio of 2:1 or 4:1 yield [(Me2N)3PCH2]2PdCl2 and [(Me2N)3PCH2]4PtI4, respectively. The Ag, Au, Sn, and Pb complexes are stable. Their properties are compared with those of the metal complexes with methylenetriphenylphosphorane, (C6H5)3P=CH2.
Aliphatic Claisen Rearrangement Promoted by Organoaluminium Reagents
Authors: Takai Kazuhiko , Mori Ichiro , Oshima Koichiro , Nozaki Hitosi 
Published: July 2006

Abstract
Organoaluminium compounds, R3Al, promote the Claisen rearrangement of allyl vinyl ether derivatives at room temperature under transfer of R or H as a nucleophile to the aldehydic carbon. Treatment of 1-butyl-2-propenyl vinyl ether with a hexane solution of Me3Al (1.0 M, 2.2 equiv) in CH2ClCH2Cl at 25 °C afforded 5-decen-2-ol (91% yield, E⁄Z=47⁄53), which was produced by the [3,3] sigmatropic rearrangement and successive methylation. The rearrangements with alkynylation, alkenylation, and hydrogenation are also achieved. The regular Claisen rearrangement products, or γ,δ-unsaturated aldehydes (ketones), are obtained at 25 °C in good to excellent yields with Et2AlSPh (2.5 equiv) or the combination of Et2AlCl (2.0 equiv) and PPh3 (2.2 equiv).
A Study of Inorganic Ion-exchangers. VIII. The Synthesis of the Crystalline Zr(RNH)xH2−x(PO4)2·yH2O and Their Characteristics (R=(CnH2n+1)3 and C5H5, n=1–6)
Authors: Kobayashi Etsuro , Shin Shigemitsu 
Published: July 2006

Abstract
The synthesis of microcrystalline compounds with the formula of Zr(RNH)xH2−x(PO4)2·yH2O (R=(CnH2n+1)3, C5H5, n=1–6, x=0.1–0.6, y=1–3) and their characteristics have been investigated. The compounds were formed by means of a hydrothermal reaction between RNH·H2PO4 and ZrOCl2 in the mole ratio of 4:1 at 130–180 °C. The layer-spacings of the trimethyl-, triethyl-, tripropyl-, tributyl-, tripentyl-, trihexylamine, and pyridine phosphates were 9.9, 13.0, 13.6, 17.0, 16.5, 18.4, and 10.9 Å respectively. In the thermal decomposition of each phosphate, the water of crystallization was eliminated at 105–130 °C. The organic base group in the alkylamine phosphates was burned in the presence of air at 330–360 °C, but this combustion was imperfect in the case of pyridine phosphate. The phosphates condensed at 400–450 °C. Zr(RNH)xH2−x(PO4)2·yH2O was also obtained by means of an ion-exchange reaction between γ-Zr(HPO4)2·2H2O and the corresponding tertiary amine. In these products, the layer-spacings of the trimethyl-, triethyl-, tripropyl-, tributyl-, tripentyl-, and trihexylamine phosphates were 17.6, 16.4, 16.7, 21.0, 21.5, and 23.2 Å respectively, while those of pyridine and piperidine phosphates were 12.4 and 18.4 Å respectively. The layer-spacings of the products increased roughly with the size of the guest molecules. When Zr(RNH)xH2−x(PO4)2·yH2O was treated with HCl, the products from the hydrothermal reaction changed to α-Zr(HPO4)2·H2O, while the products from the ion-exchange reaction returned to γ-Zr(HPO4)2·2H2O the raw material.
Synthesis and Stereoisomerization of Intra- and Intermolecularly Bridged Indigo
Authors: Omote Yoshimori , Tomotake Atsushi , Aoyama Hiromu , Nishio Takehiko , Kashima Choji 
Published: July 2006

Abstract
The intramolecularly bridged N,N′-azelaoylindigo (3) and N,N′-sebacoylindigo (4) have been synthesized from indigo and the corresponding dichloride. The intermolecularly bridged N′,N″-sebacoylbis(N-acetylindigo) (5) has been synthesized from N-acetylindigo and sebacoyl dichloride. The relative rates of the cis-to-trans thermal isomerization of 3, 4, and 5, compared with that of N,N′-diacetylindigo (1c), were as follows: 3, 0.77; 4, 3.9; 5, 1.4; 1c, 1.0.
Selective Hydrogenation of Cyclopentadiene to Cyclopentene Using Colloidal Palladium Supported on Chelate Resin
Authors: Hirai Hidefumi , Komatsuzaki Shigeru , Toshima Naoki 
Published: July 2006

Abstract
Cyclopentadiene was hydrogenated to cyclopentene selectively by using colloidal palladium supported on chelate resin with iminodiacetic acid moieties as a catalyst. The catalyst, containing metal particles of 1–6 nm in diameter, was prepared by reduction of the palladium(II)–chelate resin complex with methanol. Cyclopentene was produced in 97.1% yield at 100% conversion of cyclopentadiene at 30 °C under 1 atm of hydrogen. This value in yield was also achieved on repeated uses of the catalyst. The hydrogenation rate was correlated to the polarity parameter, ET(30) values, of the solvents used in the reaction, except in the case of dimethyl sulfoxide. The hydrogenation rates of cyclopentadiene (RD) and cyclopentene (RE) were expressed as RD=kD[H2][catalyst] and RE=kE[H2][cyclopentene][catalyst], respectively, where kD and kE are the rate constants. The equilibrium constant for complex formation between cyclopentadiene and the catalyst, KD, was estimated to be over 400 times larger than that between cyclopentene and the catalyst, KE. A mechanism, including the coordination of olefins to the catalyst and the subsequent hydrogenation of the coordinated complexes, was proposed.
Influence of Boric Acid on the Hydrolysis Rate of a Hydroxy Schiff Base
Authors: Matsuda Hiroshi , Nagamatsu Hiroaki , Okuyama Tadashi , Fueno Takayuki 
Published: July 2006

Abstract
Effects of boric acid on the rate of hydrolysis of a Schiff base derived from α-hydroxyisobutyrophenone and 2-methoxyethylamine were examined in the pH range 4.2–10.4 at 30 °C. The rate increased above pH 7 but decreased below pH 7 with increasing borate concentration following a saturation curve. This is consistent with a reaction sequence involving a preequilibrium formation of a borate–substrate complex followed by its rate-determining decay to the hydrolysis products. The formation constant of the complex showed a bellshaped change with pH but the rate constant for the complex decay was constant above pH 7, a small change being observed at lower pH. A mechanism involving an intramolecular transfer of the boron-coordinated hydroxide ion to the imine carbon within the complex is presented. Hydrazone formation from the hydroxy ketone was also examined in the presence of boric acid.
Linear Dependence of ODMR Transition Frequency on T1→S0 Transition Energy. p-Dichlorobenzene in Various Matrices
Authors: Iwasaki Noriko , Kinoshita Minoru 
Published: July 2006

Abstract
The linear dependence of ODMR transition frequency on the T1→S0 transition energy of p-dichlorobenzene in various matrices was interpreted with the spin-orbit couplings of the lowest triplet state with the triplet and singlet manifold, by assuming that the matrix dependent shifts in the triplet and singlet state energy are correlated with each other.
A Study of the Thermal Decomposition of Ruthenium Ammine Zeolites
Authors: Tatsumi Takashi , Maekawa Wataru , Tominaga Hiro-o 
Published: July 2006

Abstract
Treatment of Ru(II) ammine–NaY under nitrogen at 100 and 300 °C leads to formation of [Ru(NH3)5N2]2+–NaY and metallic RU–N2, respectively. The effect of atmosphere and the type of Ru ammine complexes and zeolites on the decomposition behavior is discussed.
Immunoassay Using a Metal-complex Compound as a Chemiluminescent Catalyst. III. Flow-through Analysis of a Labeled Antigen Bound by Immune Reaction
Authors: Hara Tadashi , Toriyama Motohiro , Tsukagoshi Kazuhiko 
Published: July 2006

Abstract
By measuring the chemiluminescence intensity by the flow-through method rather than the conventional batchwise method, the sensitivity and precision of immunoassay and the time required for the measurement of the chemiluminescence intensity were improved as follows: 20 ng–50 μg of human albumin per tube, 5.8–7.2% (n=9) coefficient of variation, and 4 min measuring time.
Sodium Dibutyldiselenocarbamate. Analytical Application to the Extraction Spectrophotometry of Heavy Metals
Authors: Honjo Takaharu 
Published: July 2006

Abstract
Sodium dibutyldiselenocarbamate is soluble in water, and the form of its dibutyldiselenocarbamic acid is extractable by methylene dichloride; more than 99% of the reagent exists in the methylene dichloride phase in the pH region of 4–10. The reagent readily forms extractable chelates with AuIII, CoII, CuII, HgII, NiII, PdII, and ZnII while it gives considerable white precipitates with AgI and HgII in the pH region of 1–7. Each chelate in methylene dichloride absorbs at wavelengths lower than 400 nm. The peak of the copper(II) chelate with the molar absorbtivity of 1.50×104 at 442 nm is not affected by the spectra of the reagent and other metal chelates, and it can be used for the selective spectrophotometric determination of copper(II) up to 0–10 μg/cm3.
The Crystal Structure of Calcium Sulfite Tetrahydrate. Interatomic Distances and Angles
Authors: Matsuno Takashi , Takayanagi Hiroaki , Furuhata Kimio , Koishi Masumi , Ogura Haruo 
Published: July 2006

Abstract
Detailed geometries of the sulfite ions and of the oxygen-coordinations around the calcium ions in calcium sulfite tetrahydrate were determined based on the results of the X-ray analysis. It was revealed that the structure consists of two alternating layers, one consisting of calcium ions and water molecules, and the other consisting of sulfite ions and water molecules.
Acid Catalysis of the Denitrosation of N-Methyl-N′-cyclohexyl-N-nitrosothiourea
Authors: Isobe Masayoshi 
Published: July 2006

Abstract
The kinetics of denitrosation of N-methyl-N′-cyclohexyl-N-nitrosothiourea has been studied in the range of pH 3.45–3.73 using four organic acids; acetic acid, formic acid, chloroacetic acid, and cyanoacetic acid. Analyses of the kinetic data including the Brönsted plots have shown that the reaction is subject to a general acid catalysis.
Synthesis and Physicochemical Properties of Dioxathia[n]ferrocenophanes
Authors: Akabori Sadatoshi , Shibahara Sumio , Habata Yoichi , Sato Masaru 
Published: July 2006

Abstract
The reaction of 1,1′-bis(2-chloroethoxy)ferrocene with 1,2-ethanedithiolate in absolute ethanol gave mononuclear 1,10-dioxa-4,7-dithia[10]ferrocenophane and binuclear 1,10,21,30-tetraoxa-4,7,24,27-tetrathia[10,10]ferrocenophane, along with a small amount of unexpected 1,13-dioxa-4,7,10-trithia[13]ferrocenophane and 1,16-dioxa-4,7,10,13-tetrathia[16]ferrocenophane. Extraction of aqueous metal picrates (M; alkali, alkaline earth, Ag+, Tl+, Cd2+, Co2+, Cu2+, Ni2+, and Hg2+) with dioxathia[n]ferrocenophanes was examined and also with the corresponding ring membered polyoxa[n]ferrocenophanes. Dioxathiaferrocenophanes showed a highly selective extraction ability towards bivalent mercury and copper ions.
Effect of Temperature on the Polarographic Catalytic Current Produced by Proteins in the Presence of Cobalt Salts
Authors: Kano Kenji , Tokimitsu Ichiro , Ikeda Tokuji , Senda Mitsugi 
Published: July 2006

Abstract
The effect of temperature on the polarographic catalytic hydrogen evolution current (Brdicka current) produced by ribonuclease-A in an ammoniacal buffer containing cobalt salt has been studied using the theoretical equation of Brdi\`{c}ka current. With increasing temperature, the Brdicka current at −1.3 V increased between 10 and 30 °C then fell off above 30 °C, whereas the currents at −1.4 and −1.5 V decreased continuously. Analysis showed that the initial increase of the Brdicka current at −1.3 V was only apparent and that the Brdicka current constant, kB, which represents the catalytic activity of the protein, always decreased with increasing temperature in the potential range of −1.3 to −1.5 V. Further analysis has revealed that the intrinsic catalytic activity of the protein-cobalt(0) complex, which is transiently formed on the electrode surface and which catalyzes the hydrogen evolution, increases with increasing temperature whereas the life time of the complex decreases and the latter decrease cancels the former increase, resulting in the decrease of the kB value with increasing temperature.
Kinetic Studies of the Complex Formation in the System of Cyclodextrin, Iodine, and Iodide
Authors: Sano Takayuki , Yamamoto Masako , Hori Hiroka , Yasunaga Tatsuya 
Published: July 2006

Abstract
Kinetic studies of complex formation in the system consisting of cyclodextrin, iodine, and iodide have been made by the temperature-jump method. By addition of α-cyclodextrin to the iodine–iodide solution, a new relaxation in addition to that due to I62−, formation was observed, but not in the case of addition of β-cyclodextrin. The reciprocal relaxation time is independent of the iodine concentration, but increases with increase of both iodide and α-cyclodextrin concentration, with a tendency to reach a constant value at their high concentrations. From these concentration dependences of the relaxation time, the observed relaxation was assigned to the conformational change of the complex between α-cyclodextrin and iodide ion, and the rate constants were estimated to be 5.9×105 and 1.2×105s−1 for the forward and backward processes, respectively. A rationalization for the difference between α-cyclodextrin and β-cyclodextrin in this complex formation is proposed in terms of the molecular structure of cyclodextrin.
Competition between Hydrogen Fluoride and Hydrogen Chloride Molecular Elimination Channels in the Infrared Multiple-photon Decomposition of 1,2-Dichloro-1,1-difluoroethane
Authors: Ishikawa Yo-ichi , Arai Shigeyoshi 
Published: July 2006

Abstract
Time-resolved infrared emission spectra have been measured in the infrared multiple-photon decomposition of CClF2CH2Cl. The spectra were composed of emissions attributable to vibrationally excited HF* and HCl*. The emission yield of HF* increased rapidly with an increase in the fluence, while the yield of HCl* showed a maximum at 20 J cm−2. These results suggest that the HF and HCl molecular elimination channels compete with each other in the unimolecular decomposition of highly vibrationally excited parent molecules. The stochastic trajectory calculations provided a satisfactory description of the fluence dependences of the HF and HCl yields observed here for CClF2CH2Cl and previously for CHClFCHClF.
ESR in Mercury(II) Iodide Thiocyanate
Authors: Takei Kunio , Sugihara Kazuo , Hagiwara Hitoshi , Nakamura Seisuke 
Published: July 2006

Abstract
Powder of mercury(II) iodide thiocyanate (HgISCN) gives a weak electron spin resonance (ESR) signal at g=2.003 in the dark. When the powder is irradiated, the ESR-signal intensity increases during the exposure. When the light is turned off, the intensity decreases. The ESR-signal may be due to electrons trapped by lattice defects.