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  • 1
    ISSN: 0044-2313
    Keywords: Rhenium complexes ; Nitrido compounds ; Mixed-ligand complexes ; X-ray crystal structure ; Ligand exchange ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mixed-Ligand Complexes of Rhenium IV. The Reaction of [ReNCl2(Me2PhP)3] with Dithiocarbamates. X-Ray Crystal Structures of trans-Chloro-dimethyldithiocarbamato-bis(dimethylphenylphosphine) nitridorhenium(V), [ReN(Cl)(Me2PhP)2(Me2dtc)], and Bis(diethyldithiocarbamato)(dimethylphenylphosphine)nitridorhenium(V), [ReN(Cl)(Me2PhP)(Et2dtc)2][ReNCl2(Me2PhP)3] reacts with dialkyldithiocarbamates, R2dtc-, under a stepwise ligand exchange. Final products of these reactions are the well-known [ReN(R2dtc)2] bischelates. Intermediatelly, however, complexes of the general formulae [ReN(Cl)(Me2PhP)2(R2dtc)] and [ReN(Me2PhP)(R2dtc)2] can be isolated. Representatives have been structurally characterized.[ReN(Cl)(Me2PhP)2(Me2dtc)] crystallizes monoclinic in the space group P21/c, Z = 4. The dimensions of the unit cell are a = 13.071(3); b = 11.622(1); c = 15.667(3) Å; β = 97.09(1)°. The rhenium atom has a distorted octahedral environment; the Re≡N bond length is 1.71(1) Å. The Re—Cl bond distance is markedly lengthened (2.665(2) Å) as a consequence of the strong trans labilizing influence of the coordinated nitrido ligand.[ReN(Me2PhP)(Et2dtc)2] crystallizes monoclinic in the space group P21/c, Z = 4, a = 17.262(3); b = 14.915(2); c = 9.888(2); β = 76.35(8)°. The equatorial coordination sphere is occupied by one phosphorus atom and three sulphur atoms. One of the dithiocarbamate ligands is coordinated bidentately; the second one with two distinct Re—S bond lengths. The Re—S(4) distance is 2.7983(2) Å which can be discussed as a weak interaction with the metal.
    Notes: Dichlorotris(dimethylphenylphosphan)nitridorhenium(V), [ReNCl2(Me2PhP)3], reagiert mit Dialkyldithiocarbamaten, R2dtc-, unter schrittweisem Ligandenaustausch. Als Endprodukte entstehen Komplexe der allgemeinen Formel [ReN(R2dtc)2]. Als Intermediate dieser Reaktion konnten Komplexe der Zusammensetzung [ReN(Cl)(Me2PhP)2(R2dtc)] und [ReN(Me2PhP)(R2dtc)2] isoliert und strukturell charakterisiert werden.[ReN(Cl)(Me2PhP)2(Me2dtc)] kristallisiert monoklin in der Raumgruppe P21/c, Z = 4. Die Elementarzelle hat die Abmessungen a = 13,071(3); b = 11,622(1); c = 15,667(3) Å; β = 97,09(1)°. Rhenium befindet sich in einer verzerrt oktaedrischen Koordinationsumgebung. Der Re≡N-Bindungsabstand beträgt 1,71(1) Å. Die trans-ständige Re—Cl-Bindung ist infolge des trans-Effektes des koordinierten Nitridoliganden stark aufgeweitet (2,665(2) Å).[ReN(Me2PhP)(Et2dtc)2] kristallisiert monoklin in der Raumgruppe P21/c, Z = 4, a = 17,262(3); b = 14,915(2); c = 9,888(2); β = 76,35(8)°. Die äquatoriale Koordinationssphäre ist mit einem Phosphor- und drei Schwefelatomen besetzt. Ein Dithiocarbamat-Ligand ist als „normales“ Chelat koordiniert; der andere ist mit zwei sehr unterschiedlichen Re—S-Abständen gebunden, wobei auch für das zweite Schwefelatom (Abstand Re—S(4): 2,7983(2) Å) Wechselwirkungen mit dem Metall diskutiert werden können.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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