While tertiary phosphane-tethered cyclopentadienyl complexes such as 1 and 2 have been investigated for some time,1 respective chelate complexes with secondary phosphane tethers have barely been investigated; only few representatives of early transition metals are known.2 In addition, some corresponding phosphido chelates are also known for early, but not for late transition metals.3 In the context of designing a new transition metal catalysis cycle avoiding changes of the oxidation state of the metal we became interested in secondary cyclopentadienylphosphane chelates and in cyclopentadienylalkylphosphido chelates of late transition metals. Here we report the syntheses and some reactions of the first late transition metal cyclopentadienylchelate complexes with silylphosphane (3, X = Cl, Br; R = SitBuMe2, SiiPr3) and secondary phosphane tethers (4).4 (1) Butenschön, H. Chem. Rev. 2000, 100, 1527. (2) Ishiyama, T.; Mizuta, T.; Miyoshi, K.; Nakazawa, H. Chem. Lett. 2003, 32, 70. (3) Ishiyama, T.; Mizuta, T.; Miyoshi, K.; Nakazawa, H. Organometallics 2003, 22, 1096. (4) Werner, I.; Butenschön, H. Eur. J. Inorg. Chem. 2014, 6051.

First late transition metal cyclopentadienyl chelate complexes with silylphosphane or secondary phosphane tethers

251st National Meeting (2016)

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