Professor Klaus Brodersen zum 70. Geburtstag gewidmel Inhaltsiibersicht. Umsetzungen von trans-MC1(CO)(PPh3)2 (M = Rh, Ir) rnit den Natrium-Derivaten der ortho-substituierten zweizahnigen Hybridliganden 2-Ph2PC6H4XH (,PXH'; X = O , S) ergaben in glatter Reaktion die Chelatkomplexe M(CO)(PPh3)(,q2-PX'), M/X = Rh/O ( l a ) , Ir/O (Za), Rh/S (1 b), Ir/S (2 b), von denen die Rhodiumverbindung 1 a durch Einkristall-Rontgenstrukturanalyse vollstandig charakterisiert wurde. Die Komplexe 1 and 2 reagierten rnit SO2 in reversibler Weise unter Bildung der Addukte M(S02)(CO)(PPh3)(,q2-PX'), MIX = Rh/O (3a), Ir/O (4a), Rh/S (3 b), Ir/S (4b). Die gleichfalls reversibel verlaufende oxidative Addition von H2 an die Iridiumkomplexe 2a und 2 b fuhrte zu den cis-Dihydriden IrH2(CO)(PPh3)(,q2-PX'), X = 0 (5 a), S (5 b). Das am Chelatring geoffnete Derivat
The title compound consists of [Ir(C3H6NS2)(C8H14)2] molecules lying on positions with site symmetry 2. Both the coordination plane, defined by the metal, S atoms and the two midpoints of the olefinic bonds, and the dithiocarbamate chelate system are essentially planar. The orientation of the coordinated C=C bonds with respect to the coordination plane is close to perpendicular [(C=C,Ir)/(Ir,S,S) interplanar angle: 79.4 (2) degrees ]. The Ir-C distances are 2.144 (3) and 2.155 (3) A, and the Ir-S bond length is 2.3661 (8) A. Due to pi-coordination, the olefinic bonds are elongated to 1.424 (5) A. The cyclooctene ligands adopt a crown conformation.
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