Pettit studies

More tecently. Brady and Pettit studied the reaction of dia/omethane diluted in Nj over different metals. 

Extensive studies have been carried out by Giggins and Pettit and by Vasantasree and Hocking on a range of nickel chromium alloys with up to 50% alloying addition. Generally the principles outlined above can be used to interpret the experimental observations, where the thermodynamics of the reaction are a major factor determining the rate of attack, depending upon whether oxide or sulphide is the stable phase. 

Lewandos and Pettit (47) observed that W(CO)6, Mo(CO)6, and toluene-W (CO) 3 show activity towards metathesis without the presence of a cocatalyst. From data obtained in a careful experimental study of the metathesis of 4-nonene with toluene-W(CO)3, they inferred that this complex loses the toluene ligand as well as a CO-ligand, giving a reacting complex with the following structure ... 

Studies of Trifluoroacetic Acid. Part VIII. Diazotisations of Aromatic Amines in Aqueous Trifluo-roacetic Acid and Other Perhalogeno-carboxylic Acids, M. R. Pettit, M. Stacey, and J. C. Tatlow, / Chem. Soc., (1953) 3081-3084. 

Smith, S.K., Pettit, D., Newlands, G.F.J., Redmond, D.L., Skuce, P.J., Knox, D.P. and Smith, W.D. (1999) Further immunisation and biochemical studies with a protective antigen complex from the microvillar membrane of the intestine of Haemonchus contortus. Parasite Immunology 21, 187—199. 

King and coworkers—formate intermediates and a kinetic approach over Cr and other Group VIb carbonyl catalysts. Like Pettit and coworkers,18 34 King et a/.25,3 J 42,43,54,59,138,155 also studied water-gas shift on mononuclear carbonyls of iron and, in a detailed investigation, indicated that Scheme 7 of Pettit et al,34 was... 

Pettit HO, Justice JB Jr. 1989. Dopamine in the nucleus accumbens during cocaine self-administration as studied by in vivo microdialysis. Pharmacol Biochem Behav 34(4) 899-904. 

Prendiville J, Crowther D, Thatcher N, Woll PJ, Fox BW, McGown A, Testa N, Stern P. McDermott R, Potter M, Pettit GR (1993) A phase I study of intravenous bry-ostatin 1 in patients with advanced cancer. Br J Cancer 68 418-424 Prendiville J, McGown AT, Gescher A, Dickson AJ, Courage C, Pettit GR, Crowther D. Fox BW (1994) Establishment of a murine leukaemia cell line resistant to the growth-inhibitory effect of bryostatin 1. Br J Cancer 70 573-578... 

Mill T., Haag, W., Penwell, P., Pettit, T. and Johnson, H. Environmental Fate and Exposure Studies. Development of a PC-SAR for Hydrolysis Esters, Alkyl Halides and Epoxides, EPA Contract No. 68-02-4254, SRI International, Menlo Park, CA. (1987). 

Since Pettit s original report, the homotropenylium ion has been studied extensively. The resulting large body of work has previously been reviewed14 22. The account given here highlights the different lines of evidence for the electronic nature of the cation. 

The other example to be discussed in this context comes from Pettit s group. Simultaneous treatment of the iron complex (/u.-CH2)[Fe(CO)4]2 (35) with hydrogen and ethylene gives both methane (66%) and propylene (6%), the expected products from the two separate reactions. In addition, ethane (—600%) is formed, with the actual hydrogenation catalyst still to be determined (72). Because simple diazoalkanes provide the cleanest method to metal-attached alkylidenes, and with the expectation that dissociative chemisorption of diazomethane to absorbed CH2 and free N2 would occur, the reactions of CH2N2 with and without H2 over various transition metals were examined in a careful study with regard to the product ratio (73). It was found, that gas-phase decomposition of the parent diazoalkane upon passage over active Ni, Pd, Fe, Co, Ru, or Cu-... 

In a series of classic studies, Pettit et al. reported the synthesis of (cyclobutadiene)iron tricarbonyl together with a variety of electrophilic substitution reactions of this aromatic system (Scheme S).25-27... 

Brown RS, Pettit K, Jones PW. 1989. A GC/GC-MS study of 2,3,7,8-TCDD using a DB-225 column and selected decomposition monitoring a quantitative tool. Chemosphere 19 171-176. 

Evidence for a role of NAc DA in cocaine reinforcement has been provided by studies of the effect of 6-OHDA lesions on cocaine self-administration. Thus, 6-OHDA lesions of the DA innervation of the nucleus accumbens result in extinction-like effects on responding for cocaine in FR schedules (Roberts et al., 1977 Roberts et al., 1980, Pettit et al., 1984) and in a decrease in break point in progressive ratio schedules (Koob et al.,... 

Therefore, self-administration studies do not provide any evidence for a specific role of DA in opiate reinforcement and on this basis it has been concluded that DA does not play a role in the reinforcing properties of opiates (Ettenberg et al., 1982 Pettit et al., 1984 Van Ree and Ramsey, 1987 Gerrits et al., 1994). 

Pettit, G. R. and Settepani. J. A.. Condensation of formaldehyde with N-bis(halo-cthyllamincs study of the products, Chen Ind, 1805. 1964. 

In a recent study, R. Pettit et at. examined the validity of tire Fischer-Tropsch carbide mechanism, the Anderson-Emmett hydroxy carbene mechanism and the Pichlcr-Schulz mediaiiism [174. In a first experiment, the Schulz Flory distribution obtained by CO/H conversion over a cobalt catalyst in the absence and in the presence of CH N] was studied. It was found that addition of CHjN resulted in a signillcant increase of the propagation rate which is in favour of the assumption of methylene as a building block, as predicted by the carbide mechanism. Furthermore, the reaction was carried out using labeled CO (90% CO and 10% CO), H2. and CHjNj in variable ratios. The number of atoms in the propenc fraction was calculated according to the three... 

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