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Cyclic Amidines Complexes: Complexes of 5: 6: 11: 12

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Band 33 b Zeitschrift für Naturforschung 1978 Contents Contents of Number 1 Cyclic Amidines Complexes: Complexes of 5:6:11:12-Tetrahydro-2,8-dime- Original Communications thylphenhomazine with Copper(II), Nickel(II) Cyclic Diazastannylenes, II. Intermolecular Lewis- and Zinc (II) Acid-Base Adducts of 1,3,2,4 A2-Diazasilastanneti- M. S. HUSSAIN and SAEED-UR-REHMAN 67 dines (In German) Arylazoisoxazolinthiones: Preparation and Reac- M. VEITH 1 tionsof4-Arylazo-3-methyl-2-isoxazolin-5-thiones Cyclic Diazastannylenes, III. The Crystal- and N. A. KASSAB, S. O. A. ALLAH, and S. A. EL- Molecular Structure of the Monoclinic Phase of BAHATT 75 1,3 - Di - tert - butyl - 2,2 - dimethyl -1,3,2,4 A2 - diaza - Derivatives of 5H-Cyclopenta[2,l-b:3,4-b']dipyri- silastannetidine (In German) din-5-one (4,5-Diazafluoren-9-one) M. VEITH 7 I. F. ECKHARD, N. G. KEATS, and L. A. SUM- Cyclic Diazastannylenes, IV. Oxidation of 1,3-Di- MERS 80 tert - butyl- 2,2 - dimethyl-1,3,2,4 X2- diazasilastanne - Investigations of Quaternary Pyridinium Salts, tidine (In German) VII. Quaternary Pyridinium Salts with Urea or M. VEITH, 0. RECKTENWALD, and E. HUMPFER 14 Carbamate Group. Preparation of Inner Salts Preparation of Polyborates with Hindered Tertiary (In German) Amines and Quaternary Ammonium Bases in W.-H. GÜNDEL 84 Organic Solvents (In German) Chemistry of Carbon Subsulphide, III. Formation of G. HELLER and B. BICHOWSKI 20 Pyrimidinthiones (In German) N,N'-Dimethylacetamidin Derivatives of Alumini- W. STADLBAUER, TH. KAPPE, and E. ZIEGLER 89 um, Gallium and Indium (In German) Intramolecular Exchange Processes in Cyclo- F. GERSTNER and J. WEIDLEIN 24 pentadien Systems. Structural Dependence of Kinetics of the Alkaline Solvolysis of Trichloro- Activation Barrieres (In German) acetate Ion in Water-Ethanol Solutions K. ALBERT and J. HAMBRECHT 94 I. M. ISSA, E. M. DIEFALLAH, M. R. MAHMOUD, Synthesis and 13C NMR Spectra of £er£-Butylated and A. M. EL-NADY 30 Cyclohexenone Epoxides (In German) LiBeSb and LiZnBi, Ternary Compounds with a K. ALBERT, H.-P. SCHNEIDER, D. KOCH, and Wurtzit-type Lattice (In German) A. RIEKER 100 CH. TIBURTIUS and H.-U. SCHUSTER 35 Photoreactions of 2,2'-Dihalogen Substituted Ben- New Antimony(V) Oxides and Hydroxides zoin Ether and Benzildimethylmonoketals in (In German) Solution (In German) H. RUMPEL, W. BERNDT, K. ADAM, and E. C. BAK and K. PRAEFCKE 106 SCHWARZMANN 39 Dibromo(dimethylamino)alane and Diiodo(dime- thylamino)alane. Preparation and Crystal Struc- Notes ture (In German) A. AHMED, W. SCHWARZ, and H. HESS 43 Ternary Compounds of Sodium and Potassium with Coordination Chemistry of Ambivalent Ligands, Manganese and Elements of the 5. Maingroup VIII. Synthesis and Reactivity of Ionic and (In German) Covalent Sulfinato Complexes of Tetraorganyl- H.-U. SCHUSTER and G. ACHENBACH 113 VB-Elements of the Type R4'E02SR (In German) A Contribution to the Knowledge of Ternary Inter- I.-P. LORENZ and J. K. THEKUMPARAMPIL 47 metallic Lithium-Phases with Zinc (resp. Cad- Formation of Copper(II) Complexes of 1,3-Diamino- mium and Indium) and Tin or Lead (In German) 2-propanol in Aqueous Solution W. POBITSCHKA and H.-U. SCHUSTER 115 L. H. J. LAJUNEN and R. KIVEKÄS 59 6 H - Dipjrrido [2,1 - b: 1', 2' - e] -1,3,5 - selenadiazinium ESR Study of Copper Complexes Adsorbed on Fully Dibromide: A Dipyrido Analogue of Selenaxan- Hydrated X and Y Zeolites thene G. MARTINI and M. F. OTTAVIANI 62 H. G. GRANT and L. A. SUMMERS 118 IV Contents The Behaviour of Phosphinato Complexes of Semiempirical Use of Chirality Functions for the Rhenium towards l,2-Bis(diphenylphosphine)- Description of the Optical Activity of Methan ethane (In German) Derivatives in the Transparent Region II E. LINDNER and H.-H. OETJEN 120 (In German) Oxidation of Sulfur-Nitrogen Compounds to Sulf- W. J. RICHTER 165 oxides by Peroxyacids (In German) X-ray Photoelectron Studies of Pentacarbonyl R. STEUDEL and F. ROSE 122 Chromium and Tungsten Complexes with Nitro- Preparation of the Manganese (II) Complex with gen Ligands (In German) 3,4-Dihydroxi-L-phenylalanine (L-DOPA) H. BINDER and D. SELLMANN 173 (In German) Synthesis of l,l,4,4-Tetramethyl-l,4-distanna-2,5- K. v. MARTIUS and K. E. SCHWARZHANS 124 cyclohexadiene and its Bis(copper(I)chloride) N-Methylsulfonyl and N-Phenylsulfonyl N-methyl- Complex (In German) hydroxylamine (In German) G. E. HERBERICH and B. HESSNER 180 M. BACKHAUS and C. BLIEFERT 125 Indole[3,2 gjindolizidines via Sodium Borohydride Investigations of Beryllium Chelates with Substi- Reduction of Indolic Imides tuted Acetoacetanilides by Mass, NMR and W. N. SPECKAMP, J. DIJKINK, P. PASMAN, and IR Spectroscopy (In German) J. C. HUBERT 127 A. KETTRUP, P. ACKERMANN, and W. RIEPE 183 Mass Spectrometric Investigation of Organic Nitro- On the Coordination of Carbon Monoxide on Bis- gen Compounds, XXIX. Electron Impact Induced (dithiolato)-Iron Complexes (In German) 1,1-Elimination of Nitrenes from Silylated Hydro- D. SELLMANN, P. KREUTZER, and E. UNGER 190 xylamine Derivatives (In German) Raman Intensities and Reactivity of Phenyl Vinyl H. SCHWARZ, B. STEINER, G. ZON, and Y. H. Ethers and Phenyl Vinyl Sulphides (In German) CHANG 129 R. R. M. BRAND, M. L. HALLENSLEBEN, H. K. SCHENKEL, and E. D. SCHMID 197 The Crystal and Molecular Structures of Methyl- Contents of Number 2 (4- Br- phenyl )amino - chlorpheny lborane, Original Communications (BrC6H4)(CH3)NB(Cl)(C6H5) and Methyl(2-methyl-4-Br-phenyl)amino-chlor- Reactions of Phosphanes MenP[OCH(CF3)2]3_n with (2 - methy lpheny 1) - borane, Hexafluoroacetone (In German) (BrC7Hti)(CH3)NB(Cl)(C7H7) (In German) G.-V. RÖSCHENTHALER 131 M. L. ZIEGLER, K. WEIDENHAMMER, K. AUTEN- 1,4-Dioxane • H20 • SbCls; Vibrational Spectra, RIETH, and H. FRIEBOLIN 200 Crystal and Molecular Structure (In German) Synthesis of New Oxindolotrimethine Merocyanine W. SCHWARZ, A. SCHMIDT, and G. E. BINDER 136 Dyes Tetramethylsilane - a Methylating Agent for Boron- Z. H. KHALIL 209 trihalides (In German) Thermal Decomposition of P,P-diphenyl-N-benzyl- W. HAUBOLD, A. GEMMLER, and U. KRAATZ 140 Preparation and Structure of [Ti(acac)3]C104 phosphinothioic Amide and P,P-diphenyl-N- (In German) methyl-phosphinothioic Amide N. S. SRIDHARA 212 U. THEWALT and T. ADAM 142 About Ba2Fe22+Fe93+Alii034 (In German) Angular Heterocycles: Studies in the Synthesis of HK. MÜLLER-BUSCHBAUM and M. HARDER 146 Some Substituted 6-Anilino-5-alkoxy-12H-benzo- New Metal - Pentafluorothiophenol Compounds [ajphenothiazines D. M. KAMINARIS and A. G. GALINOS 149 J. P. TIWARI and R. L. MITAL 214 The Crystal Structure of BaZn2P2 and BaZn2As2 Reactions with Heterocyclic Diazonium Salts, II. (In German) Synthesis of Some New Pyrazolo[l,5-c]-as- P. KLÜFERS and A. MEWIS 151 triazines and l,2,4-Triazolo[l,5-c]-as-triazines About the Formation of Macrocyclic B-N-Com- M. H. ELNAGDI, M. R. H. ELMOGHAYAR, S. M. pounds (In German) FAHMY, M. K. A. IBRAHEIM, and H. H. ALNIMA A. MELLER and H. J. FÜLLGRABE 156 216 On the Perhydrolysis of Tris(alkoxy)boranes in the Spectroscopic Studies on Pyrazaboles Presence of Some Inorganic and Organic Bases C. E. MAY, K. NIEDENZU, and S. TROFIMENKO 220 in Nonaqueous Solvents (In German) Substituent Effects in the Oxythallation of Alkenes G. HELLER and D. MARQUARD 159 M. STRASAK 224 Contents V Selenium Heterocycles, III. Synthesis of Selenolo- A Neutron Diffraction Study on the Modifications (2,3-b)quinolines of CuZrFe (In German) T. K. RAJA, N. SOUNDARARAJAN, V. BAKTHAVA- V. PROPACH and F. STEFFENS 268 CHALAM, and P. SHANMUGAM 228 The Structures of the Phases NagSru and NaisSn4 Complexation of Tertiary Amides by Phenols in (In German) Carbon Tetrachloride Solutions W. MÜLLER and K. VOLK 275 E. KWIATKOWSKI, K. KOZUBEK, and Z. PEP- Chalcogenides of As, Sb and Bi as Positive Electrodes LINSKI 230 in Lithium Cells (In German) Ion Pairs of Semiquincnes with Diorgano Thallium- J. 0. BESENHARD 279 (III) Cations (In German) Photoelectron Spectra and Molecular Properties, K. B. ULMSCHNEIDER, H. B. STEGMANN, K. LXIX. Molecules with S—N Multiple Bonds (In SCHEFFLER, and G. VIERTEL 237 German) B. SOLOUKI, H. BOCK, and 0. GLEMSER 284 Notes Oxidation of Mandelic Acid by Os(VIII) First Alkali Metal Thallium(I) Sulfides (In German) B. L. CHANDWANI and G. D. MENGHANI 291 Chemiluminescence of S02-0xidation (In German) E. GEHLE and H. SABROWSKY 241 Synthesis of Tri-ter£-butylstibine and Tetra-tert- J. STAUFF and W. JAESCHKE 293 butylcyclotetrastibane by Reaction of Di-tert- The Alcoholysis Reaction of 3,5-Difluoro-l,l,3,5- 6 6 6 butylantimonychloride with Magnesium tetraoxo-2-alkyl-l A ,3A ,5A ,2,4,6-trithiatriazin (In German) (In German) D.-L. WAGNER, H. WAGNER, and 0. GLEMSER 300 H. J. BREUNIG 242 Synthesis of Tetrakis(trimethylgermyl)-distibane Spin-Labeled Cyclic Oxyphosphoranes 4-0xy-l- (In German) oxyl-2,2,6,6-tetramethylpiperidine (In German) W. STORZER and G.-V. RÖSCHENTHALER 305 H. J. BREUNIG 244 Tin-Chalcogen Heterocycles, VIII. Dimethyltin The Insertion of Hexafluoroacetone into P-H Bonds Telluride, a Six-membered Ring (In German) of Phosphanes Me«PH3 n (In German) G.-V. RÖSCHENTHALER 311 A. BLECHER and B. MATHIASCH 246 Optically Active Transition Metal Complexes, LV. Crystal and Molecular Structure of 4-Phenyl-1,2,3- Preparation and Stereochemistry of thiadiazol-3-oxide (In German) W. WINTER, U. PLÜCKEN, and H. MEIER 316 [C5H5Mo(CO)2NN']PFfl with NN' = Ethylenedi- amine and Propylenediamine (In German) Radiolysis of Cytosine, 5-Methyl Cytosine and 2'- H. BRUNNER and M. MUSCHIOL 247 Deoxycytidine in Deoxygenated Aqueous Solu- Isolation of w-Triacontane, Aliphatic Alcohols and tion. A Pulse Spectroscopic and Pulse Conducto- Sitosterols from Convolvulus Microphyllus Sieb metric Study of the OH Adduct A.
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    Int. J. Electrochem. Sci., 4 (2009) 1511 - 1527 International Journal of ELECTROCHEMICAL SCIENCE www.electrochemsci.org Synthesis of Lead Dioxide Nanoparticles by the Pulsed Current Electrochemical Method Hassan Karami *, Mahboobeh Alipour Nano Research Laboratory, Department of Chemistry, Payame Noor Unirvesity (PNU), Abhar, Iran *E-mail: [email protected] Received: 22 June 2009 / Accepted: 11 November 2009 / Published: 1 December 2009 In this paper, lead dioxide nanoparticles were directly synthesized by pulsed current electrochemical method on the lead substrate in 4.8 M sulfuric acid solution. In order to obatin uniform morphology , narrowest size distribution and best composition of lead dioxide nanoparticles, the effect of experimental variables such as concentration of sulfuric acid, bath temperature, pulse frequency and pulse height (current amount), have been investigated. For conversion of all synthesized species to lead dioxide, each prepared sample was oxidized by low voltage method. The composition, morphology and structure were investigated using Energy Dispersive X-ray Analysis (EDX), scanning electron microscopy (SEM) and X-ray diffraction techniques (XRD). XRD results revealed lead dioxide samples, prepared under optimized experimental conditions, contain only PbO 2 in the range of 24-32 nm. Electrochemical behavior of the prepared electrodes was studied by cyclic voltammetry. The obtained results indicate that pulsed current electrochemical method can be used as a confident and controllable method for direct preparation of the lead dioxide nanoparticles on lead substrate. The lead dioxide synthesized in the optimum conditions showed an excellent discharge capacity (230 mA.h/g) when it was used as the cathode of lead-acid batteries. Keywords: Lead dioxide; Nanoparticles; Pulsed current; Direct oxidation 1.
  • Lots of Lead in the Water? Maybe Manganese Is to Blame

    Lots of Lead in the Water? Maybe Manganese Is to Blame

    7/30/2019 Lots Of Lead In The Water Maybe Manganese Is To Blame News | July 23, 2019 Lots Of Lead In The Water? Maybe Manganese Is To Blame Researchers have found the naturally occurring mineral can speed up the production of lead dioxide under certain circumstances Manganese is not a particularly toxic mineral. In fact, people need a little in their diets to remain healthy. Research at Washington University in St. Louis has shown however, that in conjunction with certain other chemicals, naturally occurring manganese can lead to big changes in the water in lead pipes. Depending on what disinfectants are used in the water, those changes can have significant — even dangerous — consequences. The results were recently published in Environmental Science and Technology. The research focuses on a unique form of lead, PbO2 or lead dioxide (lead in the plus-4 oxidation state). Lead dioxide has a very low water solubility — it does not easily dissolve in water alone. It is also uncommon in nature, unlike the more familiar PbCO3, the lead carbonate that makes up the scales that tend to form on pipes. “You don’t find PbO2 in the environment because there is no strong oxidizing agent,” said Daniel Giammar, the Walter E. Browne Professor of Environmental Engineering at the McKelvey School of Engineering. “But good disinfectants are often good oxidizing agents.” Chlorine is a great disinfectant, so much so that it’s used commonly in drinking water in America and across the world. It is also good oxidizing agent and promotes the transformation of lead carbonate to lead dioxide.
  • Wte2): an Atomic Layered Semimetal

    Wte2): an Atomic Layered Semimetal

    The Pennsylvania State University The Graduate School Department of Materials Science and Engineering TUNGSTEN DITELLURIDE (WTE2): AN ATOMIC LAYERED SEMIMETAL A Thesis in Materials Science and Engineering by Chia-Hui Lee 2015 Chia-Hui Lee Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science December 2015 ii The thesis of Chia-Hui Lee was reviewed and approved* by the following: Joshua A. Robinson Professor of Materials Science and Engineering Thesis Advisor Thomas E. Mallouk Head of the Chemistry Department Evan Pugh University Professor of Chemistry, Physics, Biochemistry and Molecular Biology Mauricio Terrones Professor of Physics, Chemistry and Materials Science & Engineering Suzanne Mohney Professor of Materials Science and Engineering and Electrical Engineering Chair, Intercollege Graduate Degree Program in Materials Science and Engineering *Signatures are on file in the Graduate School iii ABSTRACT Tungsten ditelluride (WTe2) is a transition metal dichalcogenide (TMD) with physical and electronic properties that make it attractive for a variety of electronic applications. Although WTe2 has been studied for decades, its structure and electronic properties have only recently been correctly described. We explored WTe2 synthesis via chemical vapor transport (CVT) method for bulk crystal, and chemical vapor deposition (CVD) routes for thin film material. We employed both experimental and theoretical techniques to investigate its structural, physical and electronic properties of WTe2, and verify that WTe2 has its minimum energy configuration in a distorted 1T structure (Td structure), which results in metallic-like behavior. Our findings confirmed the metallic nature of WTe2, introduce new information about the Raman modes of Td-WTe2, and demonstrate that Td- WTe2 is readily oxidized via environmental exposure.
  • WO 2014/062135 Al 24 April 2014 (24.04.2014) P O P C T

    WO 2014/062135 Al 24 April 2014 (24.04.2014) P O P C T

    (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2014/062135 Al 24 April 2014 (24.04.2014) P O P C T (51) International Patent Classification: AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, B32B 5/16 (2006.01) H01L 23/29 (2006.01) BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, B32B 27/04 (2006.01) H01L 51/52 (2006.01) DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, B32B 19/02 (2006.01) HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, (21) International Application Number: MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, PCT/SG201 3/000448 OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, (22) International Filing Date: SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, 18 October 2013 (18.10.201 3) TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (25) Filing Language: English (84) Designated States (unless otherwise indicated, for every (26) Publication Language: English kind of regional protection available): ARIPO (BW, GH, (30) Priority Data: GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, 61/715,420 18 October 2012 (18. 10.2012) US UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, (71) Applicant: TERA-BARRIER FILMS PTE LTD EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, [SG/SG]; 3, Research Link, Singapore 117602 (SG).