Complexation and Chemisorption of Trimethylphosphine on Ni Zeolites

DOI: 10.1039/f19807602519

Source and publish data:

Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 2519 - 2530 (1980)

Update date:2022-08-11

Topics:

Authors:

Schoonheydt, Robert A.

Wouwe, Dirk Van

Leeman, Hugo

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Article abstract of DOI:10.1039/f19807602519

After room temperature saturation of dehydrated NiY with trimethylphosphine two complexes are formed in the supercages.They are identified and quantified by reflectance spectroscopy as 0.92+ per unit cell and 6-8<(O_l)3-Ni-PMe3>2+ per unit cell (O_l is a lattice oxygen).The former is diamagnetic and trigonal bipyramidal, the latter is paramagnetic and compressed tetrahedral. 2+ is only stable in excess PMe3, while the mono-phosphine complex is stable to ca. 383 K in vacuo.On NiX only the paramagnetic compressed tetrahedral complex is formed.The ligand field parameters of this complex were calculated.Chemisorption on lattice and extralattice oxygens gives strongly held O=PMe3, O=P(OMe)3 and a range of decomposition products such as CO, CO2, H2O, hydrocarbons and oxygenated P on the surface.These products were qualitatively identified by i.r. and mass spectrometry.

Full text of DOI:10.1039/f19807602519

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