David J. Patmore

The aerobic methylation of arsenic by microorganisms in the presence of l-methionine-methyl-d3

Abstract The microorganisms Scopulariopsis brevicaulis, Candida humicola, and Gliocladium roseum growing aerobically, methylate a range of arsenic compounds to produce R′R″As(CH3) (R′  R″  CH3; R′  n-C4H9, R″  CH3). When l -methionine-methyl-d3 is added to the cultures the CD3 label is incorporated, intact, in the evolved arsine to a considerable extent, indicating that S-adenosylmethionine or some related sulphonium compound is involved in the biological process.

Poly(methallyl alcohol)-supported rhodium hydrogenation catalysts

Abstract A polyphosphite obtained from poly(methallyl alcohol), when treated with rhodium(I) derivatives, affords soluble and insoluble complexes, some of which are hydrogenation catalysts for olefins in toluene suspension.

Preparation and nuclear magnetic resonance spectra of the chloro-monofluorocyclophosphazenes

The cyclic chlorophosphazenes NnPnCl2n(n= 3–6) are fluorinated by a mixture of SbF3 and SbCl5 to give either the monofluoro-compound or, depending on the reagent ratio, mixtures of non-geminal chloride fluorides. The n.m.r, parameters of the monofluorides show similar ring-size effects to the monochlorofluorocyclophosphazenes.