Complexes with carbon sulfides and selenides as ligands, XXIII. Synthesis of Pt(CS)(PPh3)2) and Pt(CE)(dpmb) (E = S, Se): The First Mononuclear Thio- and Selenocarbonyl Complexes of Platinum(0)
✍ Scribed by Ebner, Martin ;Werner, Helmut
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1988
- Tongue
- English
- Weight
- 199 KB
- Volume
- 121
- Category
- Article
- ISSN
- 0009-2940
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✦ Synopsis
which are the first mononuclear thio-and selenocarbonyl complexa of platinum(0).
The most common method of generating a CS or CSe ligand in the coordination sphere of a transition metal, namely the abstraction of a sulfur or selenium atom from coordinated CS2 or CSe2 by ph~sphanes~,~', has failed thus far with Pd(0) and Pt(0). Treatment of the complexes M(q2-CS2)(PPhJ2 and M(q2-CSe2)(PPh3)2 (M = Pd, Pt) with PMe3, PMe2Ph, PMePh2 etc. does not lead to the formation of the corresponding thio-and selenocarbonyl compounds M(CE)(PPh3)2 (E = S, Se), but to mono-or dinuclear products containing P R ~C S T , CS:-, or C2Se:-units as ligands4.'). Recently, we1X6) as well as Walker, Farrar et al.7.8' observed, however, that the chelate compounds Pd(q2-CSSe)(dppe)*', Pt(q2-CS2)(dppe), Pt(q2-CSSe)(dppe), and Pt(q2-CSSe)(dpmb) react with Pt(C2H4)-(PPh3)* or Pt(PPh,), to give dinuclear thiocarbonyl complexes [L2M(p-E)Pt(CS)(PPh3)] (L2 = dppe or dpmb). As we assumed that compounds of general composition [L2M(p-CSE)Pt(PPh3),] are intermediates in the formation of [L2M(p-E)Pt(CS)(PPh3)] (see Scheme l)'), we tried to find out whether thermolysis of stable species such as [(PPh3)2Pt(p-CS2)Pt(PPh3)2] (l), [(dpmb)Pt(p-CEJ-Pt(PPh,),] (2,3), [(dpmb)Pd(p-CE2)Pt(PPh3)2] (E = S, Se)1-6' would give dinuclear homo-and hetero-metallic complexes of a similar Scheme 1.