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Syntheses and Characterization of Amino and Amido-Imido Technetium(V) and Rhenium(V) Complexes with (o-Aminophenyl)diphenylphosphine-N,P. Crystal Structures of 2>Cl*MeCN and Cl2>

DOI: 10.1039/DT9950003475

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 3475 - 3482 (1995)

Update date:2022-07-29

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Authors:

Refosco, FiorenzoRefosco, Fiorenzo

Tisato, FrancescoTisato, Francesco

Moresco, AnnarosaMoresco, Annarosa

Bandoli, GiulianoBandoli, Giuliano

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Article abstract of DOI:10.1039/DT9950003475

Reactions of (M = Tc or Re) or (X = Cl, Br or I) with the bidentate ligand (o-aminophenyl)diphenylphosphine (H2L) under controlled reaction conditions gave neutral imido-metal(V) complexes of the type ; in particular, the neutral complex 3, the crystal structure of which has been determined contains HL(-) and L(2-) ligands 'twisted' relative to each other by 101.3 deg, with the imido group bonded trans to a Cl atom, while the other chloro is equatorial.Important molecular parameters are: Re-N(2) 1.780(7), Re-N(1) 1.973(7), Re-Cl(1) 2.404(2), Re-Cl(2) 2.384(2), Re-P(1) 2.438(2) and Re-P(2) 2.492(2) Angstroem.The bent configuration of the imido core -1, indicates the peculiarity of this nitrene core.The severe distortion from octahedral geometry is also represented by the Cl(2)-Re-N(2) angle of 157.0(2) deg and by the 'bite' angles of 79.5(2) and 75.2(2) deg for the HL(-) and L(2-) ligand, respectively.Substitution reactions on and (M = Re or Tc) with H2L give cationic nitrido-metal(V) complexes of the type Cl, in which the co-ordination of two bidentate H2L chelates occurs with a mutual cis-P configuration and with the amino-N on the equatorial plane of a distorted octahedron; the site trans to the M<*>N unit is occupied by a Cl ligand.The crystal structure of Cl*MeCN 2 has also been determined.Revelant molecular parameters are: Tc-N(3) 1.627(3), Tc-N(1) 2.178(3), Tc-N(2) 2.205(4), Tc-Cl(1) 2.593(2), Tc-P(1) 2.427(2), Tc-P(2) 2.439(1) Angstroem, N(3)-Tc-Cl(1) 179.5(1) deg.

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Product name:Re(NC6H4P(C6H5)2)Br2(HNC6H4P(C6H5)2)

Cas No:171743-03-6

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