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3-Hexyne Complexes of Molybdenum(II) and Tungsten(II). Crystal Structures of [WI2(CO)(PPh3 )2 (η2-EtC2 Et)] and [WI2(CO){Ph2P(CH2)3PPh2}(η2-EtC2Et)]
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Mutlaq Al-Jahdali
Veröffentlicht/Copyright:
2. Juni 2014
Treatment of [Ml2(CO)3(NCMe)2] (M = Mo, W) with two equivalents of EtC2Et in CH2CI2 at 0°C yields the bis(3-hexyne) complexes [MI2(CO)(NCMe)(η2-EtC2Et)2] (1 and 2). Complexes 1 and 2 react with two equivalents of PPh3 in CH2CI2 to give the complexes [Ml2(CO)(PPh3)2 (η2-EtC2Et)] (3 and 4). The molecular structure of 4 (M = W) has been crystallographically determined and has a pseudo-octahedral geometry with the two PPh3 ligands trans to each other with the two cis-iodo-ligands, which together with the carbonyl and 3-hexyne ligand are occupying the equatorial plane. Reaction of 1 and 2 with an equimolar amount of Ph2P(CH2)nPPh2 (for M = Mo, n =1; for M = W, n = 1 to 6 ) in CH2CI2 affords the mono(3-hexyne) complexes [Ml2(CO){Ph2P(CH2)nPPh2}(η2-EtC2Et)] (5 - 11). The tungsten complex [Wl2(CO){Ph2P(CH2)3PPh2}(η2-EtC2Et)] (8 ) has also been crystallographically characterised and has cis-phosphorus atoms in the equatorial plane with the carbonyl and one of the iodo-ligands, with the other iodo-ligand and the 3-hexyne occupying the axial sites.
Received: 1998-8-13
Published Online: 2014-6-2
Published in Print: 1999-2-1
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- ERRATUM
Artikel in diesem Heft
- Synthesis, Spectroscopy and Structure of Diorganotin(IV) Schiff Base Complexes
- NMR-spektroskopische Untersuchungen zur Hydrolyse von funktionellen Trialkoxysilanen/ NMR-Spectroscopic Investigations on the Hydrolysis of Functional Trialkoxysilanes
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- ERRATUM
