Not metallic

Keep your distance from power lines-notify the company before working near power lines. Never work closer tlian lO feet on a ladder near power lines. Use insulated equipment (notliing metal). Never touch fallen power lines. 

When both a-positions are blocked, the highly specific reactivity toward organolithium compounds disappears and metalation depends on the kind of a-substituents present. Thus whereas 2,5-dimethylthio-phene is not metalated at all, 2-methoxy-5-methylthiophene is metalated in the 3-position, similar to the known ortho metalation of anisole. On the other hand, 5-methyl-2-methylthiothiophene is also metalated (in low yield) in the 3-position, in contrast to thioanisole... 

Aluminium spraying of steel street-lighting columns has been used since the 1950s and it is estimated that one producer alone has supplied up to 200000 such columns repainting is simpler, even on neglected columns, than on columns not metal sprayed. Aluminium spraying has been used on reflector towers used in the television link between Manchester and Edinburgh, and on similar structures. 

The elements at the upper right of the periodic table have high ionization energies so they do not readily lose electrons and are therefore not metals. Note that our knowledge of electronic structure has helped us to understand a major feature of the periodic table—in this case, why the metals are found toward the lower left and the nonmetals are found toward the upper right. 

Successive pivoting resonances of a covalent bond allows for electrical conduction to occur, as shown in Figure 1-1. A test of this theory was provided by gray and white tin. Gray tin is not metallic because all its valence orbitals are used for bonding and there is no metallic orbital available. White tin, on the other hand, has the metallic orbital available and therefore has metallic properties. 

Conversely, cling film (plasticised PVC/PVDC, (poly(vinyl chloride)/poly (vinylidene chloride), copolymer, which has very high gas-barrier properties) on peeling from a roll generates static electricity thus promoting adhesion to a surface, e.g., ceramics, but not metallic surfaces which conduct the static electricity away... 

Bismuth has the largest atom of any element of Group V, and it holds its electrons less tightly than the others do. It is a metal, but not a very good one. It is brittle and is also a poor conductor of electricity. Antimony and arsenic are semi-metals. Phosphorus and nitrogen are not metallic at all. Nitrogen exists in nature as a gas. 

A few years later, in 1953, the versatility of pyridoxal phosphate was illustrated by Snell and his collaborators who found many of the enzyme reactions in which pyridoxal phosphate is a coenzyme could be catalyzed non-enzymically if the substrates were gently heated with pyridoxal phosphate (or free pydridoxal) in the presence of di- or tri-valent metal ions, including Cu2+, Fe3+, and Al3+. Most transaminases however are not metal proteins and a rather different complex is formed in the presence of the apoprotein. 

Listen to this. Dr. Ketchum, he said. Over the phone, I heard the soundtrack from Armor for the Inner Man, the six-minute film that I had put together for Doug Lindsey in 1962 ... This armor for the inner man must be fabricated from organic molecules, not metals... etc. How in the world did he get that film ... 

The titanium carbide spectrum shows strong absorption at 0 ev., which may be attributed to the metallic nature of this carbide or to the tetravalent state of titanium. This ambiguity is not appreciably resolved by the discussion of Bundle 18), who explains how the tetravalent nature of the titanium in TiC leads to its metallic character. The TiO spectrum does not show this low-lying absorption peak TiO is not metallic and does not contain tetravalent titanium. 

The relative ease with which VpOr can be reduced to V(III) in aluminosilicates indicate the exiirence of weak metal-surface interactions and the inability of the surface to effectively passivate vanadium. Similarly, V on Kaolin (and metakaolin) exist mostly as the "free oxide and can (in part) be reduced to V(III) species. Therefore, DFCC systems containing metakaolin microspheres (or amorphous aluminosilicates (15)) should not be as effective as sepiolite in passivating metals TTke Ni and V. In fact, DCC mixtures loaded with 5000 ppm Ni-equivalents (that is 0.6% V + 0.38% Ni) are not metals resistant when metakaolin is used as a metals scavenger (1) ... 

In the past decade or two, physical scientists have become intrigued by the limitless possibilities afforded them by synthetic chemists who have produced materials that are not metals, but have metallic properties.1 4 Chief among... 

We need to develop methods to understand trends for complex reactions with many reaction steps. This should preferentially be done by developing models to understand trends, since it will be extremely difficult to perform experiments or DFT calculations for all systems of interest. Many catalysts are not metallic, and we need to develop the concepts that have allowed us to understand and develop models for trends in reactions on transition metal surfaces to other classes of surfaces oxides, carbides, nitrides, and sulfides. It would also be extremely interesting to develop the concepts that would allow us to understand the relationships between heterogeneous catalysis and homogeneous catalysis or enzyme catalysis. Finally, the theoretical methods need further development. The level of accuracy is now so that we can describe some trends in reactivity for transition metals, but a higher accuracy is needed to describe the finer details including possibly catalyst selectivity. The reliable description of some oxides and other insulators may also not be possible unless the theoretical methods to treat exchange and correlation effects are further improved. 

Antimony forms polymeric oxyhalides, and not metallic as in BiOCl. The fluoride, SbOF, has been prepared in two forms V, with a ladder structure, and iM which has a layered structure. Both forms have a trigonal bipyramidal structure about antimony with three oxygens, one fluorine and one lone pair. Structural parameters are given in Table 15, from which it can be seen that L-SbOF heads the table as the nearest to an ideal fit for trigonal bipyramidal geometry. 

Sphalerite and wurtzite, the two common forms of zinc sulfide,68 have the tetrahedral structures shown in Figures 7-5 and 7-6. Pure zinc sulfide is colorless. The minerals are usually yellow, brown, or black, the color probably being due to imperfections and impurities. The luster is not metallic, but resinous or adamantine. 

Definitely not Metal halides are by no means restricted to group 1 metals. In fact, most metals are able to form halides. Iron chloride, FeCI, and copper chloride, CuCi2, are examples. Figure 18.19 shows only the most common forms of metal compounds. In nature, iron is most commonly found as an oxide, while copper is most commonly found as a sulfide. 

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