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Survey of Experimental Results

We shall divide the experimental work according to whether the bonding is primarily a or rr. The difference is subtle and may turn out to have been more apparent than real. Compounds in which bonding is mixed, as in RMn(CO)5, will be considered with the tr-bonded compounds. [Pg.221]

Both alkyl and aryl metals have been studied, but not a very wide range of compounds. Several studies of triphenylarsene and triphenylstibine have been done. Methyl and ethyl compounds of arsenic, germanium, mercury, bismuth, and lead essentially complete the list. In virtually all cases the results have been clouded by difficulties in effecting chemical separation without altering the product distribution. The results do, nonetheless, lead to valid and important conclusions. [Pg.221]

Maddock and Sutin (56) observed the formation of numerous oxygenated products in neutron-irradiated AsPhj which, they argued, must have come from reaction of AsPh radicals with oxygen or water during the separation. The annealing effect of heating at 45° led to increased yields of AsPhj, while AsPhj products first increased and then decreased. This was interpreted as showing the involvement of phenyl radicals in a series of consecutive reactions  [Pg.221]

Work on mercury alkyls has been done by Heitz and Adloff (31-33), who studied Hg(CH3)2, Hg(C2Hj)2 and HgPh2. They found no isotope effect between Hg, Hg, and ° Hg, and no correlation with the respective conversion coefficients. They also noted that the retentions could not be satisfactorily explained by exchange of the respective ligands, and thus concluded that the molecules are reformed by an epithermal not by a thermal process. Parent yields were typically 74, 15, and 8% for the diphenyl-, dimethyl- and diethylmercury, respectively. [Pg.222]

The early work of Sutin and Dodson (85) on neutron-irradiated ferrocene exemplifies the results and problems of recoil chemistry. After dissolving their samples in hexane and extracting with aqueous solutions they isolated, after further purification, radioactive FeCp2 and a species which emerged as ionic iron(III). Adsorbed on the walls of the glass vessels remained another species soluble in acetone which accounted for up to 50-60% of the radioactive iron. This species has not yet been identified. The FeCp2 activity accounted for some 10-12% of the Fe, which increased on standing several weeks at room temperature or 2-3 days at 110° C, as is shown in Table III. [Pg.223]


Survey of Experimental Results and Related Modeling Studies... [Pg.420]

PJT Instabilities of Monoatomic Impurities in Solids Survey of Experimental Results... [Pg.421]

Experimental investigation of potential distribution across the double layer on semiconductor electrodes is most frequently performed by differential capacity (see the next section) and photocurrent measurement techniques. A survey of experimental results obtained in this field is beyond the scope of the present review. Certain data illustrating the pinning and more detailed discussion of its origins will be presented in Section IV.2. [Pg.210]

Before beginning a survey of experimental results on rare-earth spin glasses and their interpretation by model calculations, we would first suggest a brief discussion on two questions How to classify any material as a spin glass What are the ingredients a system needs to be a potential spin glass ... [Pg.216]


See other pages where Survey of Experimental Results is mentioned: [Pg.63]    [Pg.68]    [Pg.207]    [Pg.221]    [Pg.1]    [Pg.60]    [Pg.6]    [Pg.99]    [Pg.131]    [Pg.158]    [Pg.37]    [Pg.69]    [Pg.440]    [Pg.206]    [Pg.131]    [Pg.158]    [Pg.4874]    [Pg.4933]    [Pg.263]    [Pg.32]    [Pg.112]   


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