During the past few years there has been intense research activity in the design, synthesis, and characterization of materials which are formed from molecular precursors, and which have high or metal-like electrical conductivities, i.e. dcr/dT < O. It has been widely supposed that these new materials, which are commonly called molecular metals, would be pressed into service, for example as devices. Up to now, widespread, practical applications of these sub stances have not developed. The NATO Advanced Research Institute on Molecular Metals at Les Arcs, France, September 10-16, 1978 was organized to discuss the scientific and technological potential of research and development in this field. The proceedings of the Institute constitute this book. Several lectures were devoted to the assessment of the present status of research on systems which serve to define major components of the field. The systems which were discussed included TTF-TCNQ, platinum chain compounds, (SN)x, polyacetylene, polydiacetylene, graphite intercalation compounds, and mercury chain compounds. One lecture dealt with the status and potential of techriological applica tions of molecular, semiconducting and metallic materials. Texts accompanying these lectures are included in the book. In addition to the lectures, poster presentations of new results were held; these papers are also included here.

Inhalt
The Chemistry of TTF-TCNQ.- Preparation of Organic Metals and Insulators: some Ideas and Guidelines.- The Design of New Organic Electron Acceptors.- Organic Metals: Recent Synthetic Studies.- New Directions in Organic Electronic Materials Based on Tetrathiofulvalene.- Design and Synthesis of a Variable Filled Band Molecular Conductor.- Doping Organic Solids its Uses to Probe and to Modify Electronic properties.- New Types of Organic Alloys: Modification of Phase Transition of (NPPy)(TCNQ)n.- Electronic Properties of a New Radical Cation Salt, Tetraselenotetracene-Iodide: Evidence for Quasi Metallic Behavior at very Low Temperatures.- A Systematic Study of An Isomorphous Series of Organic Solid State Conductors Based on TCNQ and Iodine.- Conducting Charge-Transfer Salts of Phenazines and Quinolines.- Metal Vapor Chemistry Related to Molecular Metals.- Structural Investigations of the Peierls Transition in TTF-TCNQ and Related Compounds (TSeF-TCNQ, HMTTF-TCNQ, NMP-TCNQ).- Electronic Properties of TTF-TCNQ And Derivatives.- The Electrical Conductivity of TTF-TCNQ and Related Compounds.- Effects of Impurities on the Ordered Phases of One-Dimensional Systems.- Valence Bond Theory of Partly-Filled Conductors.- Roles of Cation Stacks in Ordering of Charge-Density Waves in TSeF-TCNQ Comparison with TTF-TCNQ.- 'METAL-LIKE' Semiconductors Role of Mobility in Molecular Conductors.- Synthesis and Properties of Semiconducting and Metallic Derivatives of Polyacetylene, (CH)X.- Structural Perspectives for Polymeric Metals.- Properties of Doped Polyacetylene, (CH)x.- Recent Progress in the Chemistry and Physics of Poly(Diacetylenes).- Studies of the Adsorption of Halogens by Polydiacetylenes.- Solid State Reactivity of some Bis(Aromatic Sulphonate) Diacetylenes.-Kinetics of Solid State Polymerization of 2,4-hexadiyne-1,6-diol-bis(p-toluene sulfonate).- Intercalation Compounds of Graphite.- Anisotropy of Graphite Intercalation Compounds.- High Electrical Conductivity Graphite Intercalation Compounds.- Salts of Aromatic Cations and Related Graphite Salts.- The Chemistry and Physics of Polythiazyl, (SN)x, and the Polythiazyl Halides.- Elemental Sulfur New Questions to an Old Problem.- Surface Studies of Electrically-Conducting CsSn2I5.- One-Dimensional Partially Oxidized Tetracyanoplatinate Metals: New Results and Summary.- Universal Behaviour of Platinum Chain Compounds, Deduced from Electrical Conduction Results.- A Comparison of the Properties of the Isostructural 1D Conductors Co0.83[Pt(C2O4)2].6H2) and Mg0.82[Pt(C2O4)2].6H2O.- Resonance Raman Spectroscopy as a Probe of the Mixed-Valence State of Linear-Chain Complexes.- Conductive Molecular Crystals: Metallic Behavior in Partially Oxidized Porphyrin, Tetrabenzporphyrin, and Phthalocyanine.- Synthesis and Properties of Several New Molecular Conductors.- The Structure and Magnetic and Electrical Conductivity Properties of the Charge Transfer Compound 1,1?-Dimethylferrocenium Bis-(Tetracyanoquinodimethane), [(CH3C5H4)2Fe][TCNQ]2.- Perylene-Dithiolate Complexes; The Platinum Salt.- Hg3-?AsF6: Incommensurate Linear Chains with Quasi-One-Dimensional Lattice Dynamics and Electronic Properties.- One Dimensional Fluctuations and the Chain-Ordering Transformation in Hg3-?AsF6.- Potential Applications of Molecular Metals.- Reevaluation and Extensions of Existing Systems.- New Systems Comprised of Non-Metallic Elements.- New Organic Materials.- New Organometallic Systems.- New Highly Conducting Coordination Compounds.- Metal-Rich Systems.- Potential Technology Directionsof Molecular Metals.