Basische metalle

Reactions of H2 and R3SiH with Electrophilic Cobalt(III) Alkyl Complexes: Spectroscopic Characterization, Dynamics, and Chemistry of [Cp*Co(L)(H)(η2-H2)][B(ArF)4] and [Cp*Co(L)(H)(η2-HSiR3)][B(ArF)4]

“…Dicobalt octacarbonyl was purchased from Strem and used as received. Na[B(Ar F ) 4 ] (Ar F = 3,5-(CF 3 ) 2 C 6 H 3 ), [H(OEt 2 ) 2 B(Ar F ) 4 ], 7a , Cp*Co(P(OMe) 3 )(C 2 H 4 ). , and Cp*Co(PMe 3 )(C 2 H 4 ) 87,88 were prepared according to literature procedures. Polymer grade ethylene (99.9%) and hydrogen were purchased from National Welders Supply Co. and used as received.…”

Co(I)-Mediated Removal of Addends on the C60 Cage and Formation of the Monovalent Cobalt Complex CpCo(CO)(η2-C60)

“…Compared to typical [6,6]-bonds in C 60 (1.38 Å), 1c the C2−C3 bond is significantly elongated (1.452(4) Å), presumably due to d−π* type back-donation from the cobalt-center to C 60 . 17 This can be also proved by IR carbonyl stretching 19 as an indicator of electron density on the metal-center: 2012 cm −1 for CpCo-(CO)(η 2 -C 60 ) shifted to higher energy than 1978 cm −1 for CpCo(CO)(η 2 -C 2 H 4 ), 20 reflecting the electron-withdrawing character of C 60 .…”

CpCo(i) precatalysts for [2 + 2 + 2] cycloaddition reactions: synthesis and reactivity

“…29 In addition, comparison of IR for the two complexes data showed a shift from 1921 cm −1 to 1899 cm −1 for the CO stretching band, thus indicating a higher degree of backbonding for the more electron-rich phosphine, which might also hamper a smooth substitution of the second CO for the alkene. 30 However, the complexes except 3e are stable enough to be isolated and stored under inert atmosphere at room temperature and even survive (short) expositions to air if not being stable under air. As they can be activated by irradiation, long-term storage under exclusion of light is recommended.…”