Collman

Collman J P, Hegedus L S, Norton J R and Finke R G 1987 Principles and Applications of Organotransitlon Metal Chemistry (Mill Valley, CA University Soienoe)... 

Styrene is difficult to purify and keep pure. Usually contains added inhibitors (such as a trace of hydroquinone). Washed with aqueous NaOH to remove inhibitors (e.g. rert-butanol), then with water, dried for several hours with MgS04 and distd at 25° under reduced pressure in the presence of an inhibitor (such as 0.005% p-tert-butylcatechol). It can be stored at -78°. It can also be stored and kept anhydrous with Linde type 5A molecular sieves, CaH2, CaS04, BaO or sodium, being fractionally distd, and distd in a vacuum line just before use. Alternatively styrene (and its deuterated derivative) were passed through a neutral alumina column before use [Woon et al. J Am Chem Soc 108 7990 1986 Collman J Am Chem Soc 108 2588 1986]. 

Tetra-n-butylammonium perchlorate [1923-70-2] M 341.9", m 210"(dec). Crystd from EtOH, ethyl acetate, from n-hexane or diethyl ether/acelone mixture, ethyl acetate or hot CH2CI2. Dried in vacuum at room temperature over P2O5 for 24h. [Anson et al. J Am Chem Soc 106 4460 1984 Ohst and Kochi J Am Chem Soc 108 2877 1986 Collman et al. J Am Chem Soc 108 2916 1986 Blau and Espenson J Am Chem Soc 108 1962 1986 Gustowski et al. J Am Chem Soc 108 1986 Ikezawa and Kutal J Org Chem 52 3299... 

Smyth, R. J., Yi, Y., Singh, A., and Collman, R. G. (1998). Determinants of entry cofactor utilization and tropism in a dualtropic human immunodeficiency virus type 1 isolate. J. Virol. 72 4478-4484. 

Collman, J.P. Hegedus, L.S. Norton, J.R. Finke, R. G. Principles and Applications of Organotransi-tion Metal Chemistry, University Science Books Mill Valley, California, 1987, p. 870. 

Carbonylate anions are the most suitable starting material for the synthesis of silylmetal compounds. A prerequisite for the preparation of compounds with a formal M = Si double bond is the use of metallate dianions like Na2Fe(CO)4 (Collman s reagent) together with the respective dichlorosilanes [96]. 

The reaction (Eq. (5)) in THF yields labile THF adducts which are converted into the more stable HMPA adducts by addition of HMPA. The various equilibria existing between Na2Fe(CO)4 and several donor solvents are described in a detailed paper by Collman in HMPA, the solvent-separated supernucleophilic ion pair [Na+x HMPA x Fe(CO)4 ] is the kinetically dominant species, with no kinetic contribution from free [Fe(CO)J2 . In THF, Na2Fe(CO)4 is much less dissociated, with tight-ion paired [NaFe(CO)4] as the kinetically important species [96],... 

Collman JP, Hegedus LS, Norton JR, Finke RG (1987) Principles and applications of organotransition metal chemistry, 2nd edn. University Science Books, Mill Valley, CA... 

Bettelheim A, Reed R, Hendricks NH, Collman JP, Murray RW (1987) J. Electroanal. Chem. 

Collman JP, Christian PA, Current S, Denisevich P, Halbert TR, Schmittou ER, Hodgson KO (1976) Inorg Chem 15 223... 

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