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Palladium
Palladium information, including Technical Data, Safety Data and its high purity properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included.

Palladium is a member of the platinum group of metals. It is an excellent hydrogenation and dehydrogenation catalyst. It is alloyed and used in jewelry. The metal is used in dentistry, watch making, and in making surgical instruments and electrical contacts. Platinum is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity); metals in the form of foil, sputtering target, and rod, and compounds as submicron and nanopowder.

Palladium facts, including appearance, CAS #, and molecular formula and safety data, research and properties are

 

  Hydrogen                                 Helium
  Lithium Beryllium                     Boron Carbon Nitrogen Oxygen Fluorine Neon
  Sodium Magnesium                     Aluminum Silicon Phosphorus Sulfur Chlorine Argon
  Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Hydrogen Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
  Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
  Cesium Barium Cerium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon
                                     
      Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium    
      Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawerencium    


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available for many specific states, forms and shapes on the product pages listed to the left. Elemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. Nanoparticles and nanopowders provide ultra high surface area which nanotechnology research and recent experiments demonstrate function to create new and unique properties and benefits.

Oxides are available in forms including powders and dense pellets for such uses as optical coating and thin film applications. Oxides tend to be insoluble. Fluorides are another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Lithium is available in soluble forms including chlorides, nitrates and acetates. These compounds are also manufactured as solutions at specified stoichiometries.

Lithium is a Block S, Group 1, Period 2 element. The electronic configuration is [He] 2s1. In its elemental form lithium's CAS number is 7439-93-2. The lithium atom has a radius of 152.pm and it's Van der Waals radius is 182.pm.

All elemental metals, compounds and solutions may be synthesized in ultra high purity (e.g. 99.999%) for laboratory standards, advanced electronic, metallurgy and optical materials and other high technology advantages. Information is provided for stable (non-radioactive) isotopes. Organo-Metallic Lithium compounds are soluble in organic or non-aqueous solvents. See Analytical Services for information on available certified chemical and physical analysis techniques including MS-ICP, X-Ray Diffraction, PSD and Surface Area (BET) analysis.

Lithium was first discovered by Johann Arvedson in 1817.

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Abundance. The following table shows the abundance of lithium and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope.

Isotope
Atomic Mass
% Abundance on Earth
Li-6
6.0151223
7.5
Li-7
7.0160040
92.5

Safety Data. The safety data for lithium metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin.

Ionization Energy. The ionization energy for lithium (the least required energy to release a single electron from the atom in it's ground state in the gas phase) is stated in the following table:

1st Ionization Energy
520.23 kJ mol-1
2nd Ionization Energy
7298.22 kJ mol-1
3rd Ionization Energy
11815.13 kJ mol-1

Conductivity. As to lithium's electrical and thermal conductivity, the electrical conductivity measured as to electrical resistivity @ 20 şC is 8.55 μΩcm and its electronegativities (or its ability to draw electrons relative to other elements) is 0.98. The thermal conductivity of lithium is 84.7 W m-1 K-1.

Thermal Properties. The melting point and boiling point for lithium are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization.

Heat of Fusion
4.6 kJ mol-1
Heat of Vaporization
147.7 kJ mol-1
Heat of Atomization
157.8 kJ mol-1

 
Formula Atomic Number Molecular Weight Electronegativity (Pauling) Density Melting Point
Boiling Point
Vanderwaals radius
Ionic radius Energy of first ionization
Pd 46 106.42 g.mol -1 2.2 12020 g.cm-3 at 20 °C 1554.9 °C 2963 °C .pm nm kJ.mol-1

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Recent Research & Development for Palladium

  • Catalytic membrane-installed microchannel reactors for one-second allylic arylation. Yamada YM, Watanabe T, Torii K, Uozumi Y. Chem Commun (Camb). 2009 Oct 7;(37):5594-6. Epub 2009 Aug 18. PMID: 19753368 [PubMed - in process]

  • Synthesis of deuterated benzyladenine and its application as a surrogate. Modutlwa N, Tada H, Sugahara Y, Shiraki K, Hara N, Deyashiki Y, Ando T, Maegawa T, Monguchi Y, Sajiki H. Nucleic Acids Symp Ser (Oxf). 2009;(53):105-6. PMID: 19749282 [PubMed - in process]

  • Highly substituted indole library synthesis by palladium-catalyzed coupling reactions in solution and on a solid support. Worlikar SA, Neuenswander B, Lushington GH, Larock RC. J Comb Chem. 2009 Sep-Oct;11(5):875-9. PMID: 19746991 [PubMed - in process]

  • Mechanistic Studies on the Formation of Linear Polyethylene Chain Catalyzed by Palladium Phosphine-Sulfonate Complexes: Experiment and Theoretical Studies. Noda S, Nakamura A, Kochi T, Chung LW, Morokuma K, Nozaki K. J Am Chem Soc. 2009 Sep 11. [Epub ahead of print] PMID: 19746977 [PubMed - as supplied by publisher]

  • Palladium-Catalyzed Alkenylation of Quinoline-N-oxides via C-H Activation under External-Oxidant-Free Conditions. Wu J, Cui X, Chen L, Jiang G, Wu Y. J Am Chem Soc. 2009 Sep 11. [Epub ahead of print] PMID: 19746974 [PubMed - as supplied by publisher]

  • Sterically-Directed Consecutive and Size-Selective Self-Assembly of Palladium Diphosphane Complexes with an Ar-BIAN Ligand: Unexpected Formation of Pentameric and Hexameric Aggregates. Holló-Sitkei E, Szalontai G, Lois I, Gömöry A, Pollreisz F, Párkányi L, Jude H, Besenyei G. Chemistry. 2009 Sep 11. [Epub ahead of print] PMID: 19746472 [PubMed - as supplied by publisher]

  • The Newman-Kwart Rearrangement of O-Aryl Thiocarbamates: Substantial Reduction in Reaction Temperatures through Palladium Catalysis. Harvey JN, Jover J, Lloyd-Jones GC, Moseley JD, Murray P, Renny JS. Angew Chem Int Ed Engl. 2009 Sep 10. [Epub ahead of print] No abstract available. PMID: 19746383 [PubMed - as supplied by publisher]

  • Studies on the Synthesis and Activity of Three Tripalladium Complexes Containing Planaramine Ligands. Farhad M, Yu JQ, Beale P, Fisher K, Huq F. ChemMedChem. 2009 Sep 10. [Epub ahead of print] PMID: 19746359 [PubMed - as supplied by publisher]

  • Controlled Formation of Concave Tetrahedral/Trigonal Bipyramidal Palladium Nanocrystals. Huang X, Tang S, Zhang H, Zhou Z, Zheng N. J Am Chem Soc. 2009 Sep 10. [Epub ahead of print] PMID: 19743854 [PubMed - as supplied by publisher] Related Articles

  • Ring-Construction/Stereoselective Functionalization Cascade: Total Synthesis of Pachastrissamine (Jaspine B) through Palladium-Catalyzed Bis-cyclization of Bromoallenes. Inuki S, Yoshimitsu Y, Oishi S, Fujii N, Ohno H. Org Lett. 2009 Sep 9. [Epub ahead of print] PMID: 19739618 [PubMed - as supplied by publisher]

  • Palladium(II) Complexes of New Bulky Bidentate Phosphanes: Active and Highly Regioselective Catalysts for the Hydroxycarbonylation of Styrene. Frew JJ, Damian K, Rensburg HV, Slawin AM, Tooze RP, Clarke ML. Chemistry. 2009 Sep 8. [Epub ahead of print] PMID: 19739216 [PubMed - as supplied by publisher]

  • A Palladium-Catalyzed Oxidative Cycloaromatization of Biaryls with Alkynes Using Molecular Oxygen as the Oxidant. Shi Z, Ding S, Cui Y, Jiao N. Angew Chem Int Ed Engl. 2009 Sep 8. [Epub ahead of print] No abstract available. PMID: 19739185 [PubMed - as supplied by publisher]

  • Palladium-Catalyzed Hydroxylation of Aryl Halides under Ambient Conditions. Sergeev AG, Schulz T, Torborg C, Spannenberg A, Neumann H, Beller M. Angew Chem Int Ed Engl. 2009 Sep 8. [Epub ahead of print] No abstract available. PMID: 19739153 [PubMed - as supplied by publisher]

  • Integration of serpentine channels for microchip electrophoresis with a palladium decoupler and electrochemical detection. Bowen AL, Scott Martin R. Electrophoresis. 2009 Sep 8. [Epub ahead of print] PMID: 19739137 [PubMed - as supplied by publisher]

  • In situ control of phenol adsorption on conductive pd-fluorine-doped tin dioxide-supported and pd-alumina-supported catalysts in electrocatalytic hydrogenation. Tountian D, Brisach-Wittmeyer A, Nkeng P, Poillerat G, Ménard H. Langmuir. 2009 Sep 15;25(18):11105-11. PMID: 19735154 [PubMed - in process]

  • Thermodynamic and Kinetic Characterization of Hydrogen-Deuterium Exchange in beta-Phase Palladium. Luo W, Cowgill DF, Causey RA. J Phys Chem B. 2009 Sep 8. [Epub ahead of print] PMID: 19735117 [PubMed - as supplied by publisher]

  • High-throughput metal screening in pharmaceutical samples by ICP-MS with automated flow injection using a modified HPLC configuration. Tu Q, Wang T, Welch CJ. J Pharm Biomed Anal. 2009 Aug 15. [Epub ahead of print] PMID: 19733025 [PubMed - as supplied by publisher]

  • Palladium-Catalyzed Heteroannulation of [60]Fullerene with Anilides via C-H Bond Activation. Zhu B, Wang GW. Org Lett. 2009 Sep 4. [Epub ahead of print] PMID: 19731923 [PubMed - as supplied by publisher]

  • Palladium-Catalyzed Cross-Coupling of Aryl Halides Using Organotitanium Nucleophiles. Lee HW, Lam FL, So CM, Lau CP, Chan AS, Kwong FY. Angew Chem Int Ed Engl. 2009 Sep 3. [Epub ahead of print] No abstract available. PMID: 19731296 [PubMed - as supplied by publisher]

  • The use of nanoparticles in electroanalysis: an updated review. Campbell FW, Compton RG. Anal Bioanal Chem. 2009 Sep 3. [Epub ahead of print] PMID: 19730834 [PubMed - as supplied by publisher] Related Articles Org Lett. 2008 May 1;10(9):1851-4. Epub 2008 Apr 9.

 

 

 

 

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