142103-23-9Relevant academic research and scientific papers
Photochemical synthesis and stereodynamic behavior of alkoxy-bridged (silylene)(germylene)iron complexes
Koe, Julian R.,Tobita, Hiromi,Ogino, Hiroshi
, p. 2479 - 2483 (1992)
Mixed (silylene)(germylene)iron complexes have been synthesized for the first time and are internally stabilized by a donor bridging alkoxy group: [Cp′(CO)Fe{GeMe2O(R)-SiMe2}] (Cp′ = C5Me5; R = Me, But). Two-dimensional and variable-temperature 1H NMR spectroscopies establish germylene-methyl group exchange. Computer simulation of the spectra and calculation using the Eyring equation yield values for ΔG≠298 for the process of 62 kJ mol-1 (R = Me) and 61 kJ mol-1 (R = But). A mechanism involving cleavage of the Ge-O partial bond, followed by rotation of the resulting coordinated germylene moiety about the Fe = Ge double bond, is proposed for this exchange. The (silylene)(germylene)iron complexes are weighted toward the (methoxysilyl)(germylene) form, indicating that germylene ligands are more stable than their silicon analogues.
