Multiple .eta.2-arene coordination. Structure and isomerism of naphthalene complexes of rhodium phosphine [(C5Me5)Rh(PMe3)]

Structure and dynamics of the η2-hexafluorobenzene complexes [Re(η5-C5H4R)(CO) 2(η2-C6F6)] (R = H or Me) and [Rh(η5-C5Me5)(PMe3)( η2-C6F6)]

“…Examination of the reactions of fused polycyclic aromatics has revealed the origin of the tendency to form η 2 -complexes and provided examples of η 2 -arene and aryl hydride complexes in equilibrium. 3,[8][9][10] The hapticity shift from η 6 to η 4 may play a key role in substitution reactions of arenes and be important in transition-metal catalysed hydrogenation of arenes but examples of η 4 -arene complexes are limited. 11 Geiger and co-workers 12 have recently examined arene co-ordination in formally 19 e Ϫ Ru and Rh sandwich complexes and η 6 to η 4 hapticity changes of arenes induced by electron transfer.…”

Photochemical studies of (η5-C5H5)Ru(PPh3)2Cl and (η5-C5H5)Ru(PPh3)2Me: formation of Si–H and C–H bond activation products

“…63 In the case of CpRh-(PMe 3 )(η 2 -naphthalene), diagnostic proton resonances are seen at δ 3.49 (qd, J = 5.6, 2.4 Hz) and δ 4.09 (td, J = 6.6, 2.6 Hz) for the η 2 -bound olefinic protons. 64 A solution containing 8 mg of naphthalene and 2 was therefore prepared and irradiated in situ at 198 K.…”

“…Two rotamers therefore often exist which can interconvert. 64 Warming this solution above 230 K led to the decomposition of the resultant complexes rather than further reaction to form the corresponding naphthyl product.…”

Mehrfachkoordination an Arene: die Koordination von sechs Rutheniumatomen an Naphthalin-1,8-diyl in [Ru6(μ6-C10H6)(μ3-PPh)(CO)14]

“…Untersuchungen zu diesen Verbindungen werden oft durch die schwierige Einführung des polycyclischen Arens in die Koordinationssphäre des Clusters erschwert. Sie beschränkten sich daher bisher hauptsächlich auf mono-und dinucleare Verbindungen mit Wechselwirkungen durch s-Bindungen wie in [Fe(C 10 H 7 ) 4 ][LiOEt 2 ] 2 [5] oder häufiger durch p-Komplexierung über h 2 -, h 4 -, h 6 -oder bisallylische h 3 :h 3 -Wechselwirkungen wie in den Verbindungen [Rh 2 (C 5 Me 5 ) 2 (1,2-h 2 -3,4-h 2 -C 10 H 8 )(PMe 3 ) 2 ], [6] [RhCp(h 4 -C 14 H 10 )], [7] [Ru(h 4 -C 8 H 12 )(h 6 -C 10 H 8 )] [8] und [Fe 2 (CO) 6 (mh 3 :h 3 -C 14 H 10 )]. [9] Eines unserer derzeitigen Ziele ist deshalb, [11] Kristallstrukturanalyse [13] 12 ] 4 werden an anderer Stelle beschrieben.…”

“…Experimentelles6'-4 PF6 : Eine Lösung von 0.105 g (0.107 mmol) 5' in 20 mL CH 3 CN wurde zu einer Lösung von 0.054 g (0.214 mmol) AgPF 6 in 2 mL CH3 CN gegeben. Nach 12 h wurde die Suspension 15 min bei 5000 U min À1 zentrifugiert.…”