Photoreaction of silyliron(II) complex Cp*Fe(CO)2SiMe3 (Cp* = η5C5Me5) in the presence of p-tolylgermane

Amr El-Maradny; Hiromi Tobita; Hiroshi Ogino

doi:10.1021/om960504z

Photoreaction of silyliron(II) complex CpFe(CO)₂SiMe₃ (Cp = η⁵C₅Me₅) in the presence of p-tolylgermane

Amr El-Maradny, Hiromi Tobita, Hiroshi Ogino

IEHE - Institute for Excellence in Higher Education (organization affiliation only)

Tohoku University

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Photolysis of Cp*Fe(CO)₂SiMe₃ (3) in the presence of p-TolGeH₃ (4) gave a mixture of cis and trans mono(germylene)-bridged diiron complexes, Cp*₂Fe₂(CO)₂(μ-CO)(μ-Gep-TolH) (cis-5, trans-5), a mixture of two kinds of trans bis(germylene)-bridged diiron complexes, Cp*₂Fe₂(CO)₂(μ-Gep-TolH)₂ (syn-trans-6, anti-trans-6), and a complex with two Fe⋯H⋯Ge 3-center 2-electron bonds, Cp*₂Fe₂(CO)₂(μ;-Gep-TolH ₂)₂ (7). A cis isomer of complex 6 (syn-cis(H)-6) was formed as the sole product by the thermolysis of complex 7. Photolysis of 7 or syn-cis(H)-6 resulted in the conversion to a mixture of syn-trans-6 and anti-trans-6. Reversible thermal and photochemical interconversion between cis and trans isomers of complex 5 was observed. The molar ratio of the cis and trans isomers of complex 5 in C₆D₆ was 7:93 at thermal equilibrium at 55°C and 84:16 at the photostationary state at 6°C.

Original language	English
Pages (from-to)	4954-4958
Number of pages	5
Journal	Organometallics
Volume	15
Issue number	23
DOIs	https://doi.org/10.1021/om960504z
Publication status	Published - 1996 Nov 12

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title = "Photoreaction of silyliron(II) complex Cp*Fe(CO)2SiMe3 (Cp* = η5C5Me5) in the presence of p-tolylgermane",

abstract = "Photolysis of Cp*Fe(CO)2SiMe3 (3) in the presence of p-TolGeH3 (4) gave a mixture of cis and trans mono(germylene)-bridged diiron complexes, Cp*2Fe2(CO)2(μ-CO)(μ-Gep-TolH) (cis-5, trans-5), a mixture of two kinds of trans bis(germylene)-bridged diiron complexes, Cp*2Fe2(CO)2(μ-Gep-TolH)2 (syn-trans-6, anti-trans-6), and a complex with two Fe⋯H⋯Ge 3-center 2-electron bonds, Cp*2Fe2(CO)2(μ;-Gep-TolH 2)2 (7). A cis isomer of complex 6 (syn-cis(H)-6) was formed as the sole product by the thermolysis of complex 7. Photolysis of 7 or syn-cis(H)-6 resulted in the conversion to a mixture of syn-trans-6 and anti-trans-6. Reversible thermal and photochemical interconversion between cis and trans isomers of complex 5 was observed. The molar ratio of the cis and trans isomers of complex 5 in C6D6 was 7:93 at thermal equilibrium at 55°C and 84:16 at the photostationary state at 6°C.",

author = "Amr El-Maradny and Hiromi Tobita and Hiroshi Ogino",

year = "1996",

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doi = "10.1021/om960504z",

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AU - El-Maradny, Amr

AU - Tobita, Hiromi

AU - Ogino, Hiroshi

PY - 1996/11/12

Y1 - 1996/11/12

N2 - Photolysis of Cp*Fe(CO)2SiMe3 (3) in the presence of p-TolGeH3 (4) gave a mixture of cis and trans mono(germylene)-bridged diiron complexes, Cp*2Fe2(CO)2(μ-CO)(μ-Gep-TolH) (cis-5, trans-5), a mixture of two kinds of trans bis(germylene)-bridged diiron complexes, Cp*2Fe2(CO)2(μ-Gep-TolH)2 (syn-trans-6, anti-trans-6), and a complex with two Fe⋯H⋯Ge 3-center 2-electron bonds, Cp*2Fe2(CO)2(μ;-Gep-TolH 2)2 (7). A cis isomer of complex 6 (syn-cis(H)-6) was formed as the sole product by the thermolysis of complex 7. Photolysis of 7 or syn-cis(H)-6 resulted in the conversion to a mixture of syn-trans-6 and anti-trans-6. Reversible thermal and photochemical interconversion between cis and trans isomers of complex 5 was observed. The molar ratio of the cis and trans isomers of complex 5 in C6D6 was 7:93 at thermal equilibrium at 55°C and 84:16 at the photostationary state at 6°C.

AB - Photolysis of Cp*Fe(CO)2SiMe3 (3) in the presence of p-TolGeH3 (4) gave a mixture of cis and trans mono(germylene)-bridged diiron complexes, Cp*2Fe2(CO)2(μ-CO)(μ-Gep-TolH) (cis-5, trans-5), a mixture of two kinds of trans bis(germylene)-bridged diiron complexes, Cp*2Fe2(CO)2(μ-Gep-TolH)2 (syn-trans-6, anti-trans-6), and a complex with two Fe⋯H⋯Ge 3-center 2-electron bonds, Cp*2Fe2(CO)2(μ;-Gep-TolH 2)2 (7). A cis isomer of complex 6 (syn-cis(H)-6) was formed as the sole product by the thermolysis of complex 7. Photolysis of 7 or syn-cis(H)-6 resulted in the conversion to a mixture of syn-trans-6 and anti-trans-6. Reversible thermal and photochemical interconversion between cis and trans isomers of complex 5 was observed. The molar ratio of the cis and trans isomers of complex 5 in C6D6 was 7:93 at thermal equilibrium at 55°C and 84:16 at the photostationary state at 6°C.

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Photoreaction of silyliron(II) complex CpFe(CO)₂SiMe₃ (Cp = η⁵C₅Me₅) in the presence of p-tolylgermane

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