Abstract:Two series of germanium compounds, (pTol) 3 Ge-MMe 3 (M = Si (1), Ge (2), Sn (3)) and (Me 3 Si) 3 Ge-MPh 3 (M = Ge (4), Sn (5)), were prepared using lithium or potassium intermediates. The changing of the reaction conditions results in trigermane Ph 3 Ge-Ge(SiMe 3 ) 2 -GePh 3 (6). The molecular structures of 1, 2, and 6 were investigated by X-ray analysis. By UV/visible spectroscopy it is established that introduction of a tin atom results in a significant bathochromic absorption shift. Furthermore, according … Show more
“…In contrast with the free molecular oligogermanes,, all complexes showed a total absence of luminescence both in solution and in solid form. The presence of transition metal fragments, M(CO) 3 (M = Cr, Mo, W), within the complexes results in a quenching of the emissive properties.…”
Section: Resultsmentioning
confidence: 95%
“…A comparison between the structural parameters of complexes 3c , 4a , 5a , and those of the parent oligogermanes 3 , 4 , and 5 , respectively (Table ), shows minimal differences, indicating a strong mutual influence of the Ge2, aryl and M(CO) 3 fragments in the molecule, where the acceptor properties of M(CO) 3 are counterbalanced by a Ge2 donation.…”
Section: Resultsmentioning
confidence: 99%
“…Furthermore, these data indicate that the orbitals of Cr(CO) 3 are located on the HOMO of the whole molecule. The parent digermane 4 is oxidized irreversibly at a much higher potential E ox 1.65 V vs. Ag/AgCl (1.20 V vs. Fc/Fc + ).…”
The ligand properties of a series of aryl oligogermanes R3Ge‐GeAr3, 3–7 [Me3Ge‐GePh3 (3), Me3Ge‐Ge(pTol)3 (4), Ph3Ge‐GePh3 (5), (C6F5)3Ge‐GePh3 (6), Ph3Ge‐GeMe2GePh3 (7)] for the synthesis of transition metal carbonyl complexes such as R3Ge‐GeAr2(R′C6H4‐η6)M(CO)3 (M = Cr, 3a–7a; M = Mo, 3b; M = W, 3c) were investigated. The target complexes were obtained in moderate yields using several different synthetic approaches. The physicochemical properties of these new derivatives were investigated by IR, UV/Vis, NMR spectroscopy, electrochemistry, and DFT calculations. The molecular structures of 3c, 4a, and 5a were studied by single‐crystal X‐ray diffraction analysis. A comparative analysis of donor and acceptor properties of aryl oligogermanes as ligands for transition metal carbonyl complexes is reported.
“…In contrast with the free molecular oligogermanes,, all complexes showed a total absence of luminescence both in solution and in solid form. The presence of transition metal fragments, M(CO) 3 (M = Cr, Mo, W), within the complexes results in a quenching of the emissive properties.…”
Section: Resultsmentioning
confidence: 95%
“…A comparison between the structural parameters of complexes 3c , 4a , 5a , and those of the parent oligogermanes 3 , 4 , and 5 , respectively (Table ), shows minimal differences, indicating a strong mutual influence of the Ge2, aryl and M(CO) 3 fragments in the molecule, where the acceptor properties of M(CO) 3 are counterbalanced by a Ge2 donation.…”
Section: Resultsmentioning
confidence: 99%
“…Furthermore, these data indicate that the orbitals of Cr(CO) 3 are located on the HOMO of the whole molecule. The parent digermane 4 is oxidized irreversibly at a much higher potential E ox 1.65 V vs. Ag/AgCl (1.20 V vs. Fc/Fc + ).…”
The ligand properties of a series of aryl oligogermanes R3Ge‐GeAr3, 3–7 [Me3Ge‐GePh3 (3), Me3Ge‐Ge(pTol)3 (4), Ph3Ge‐GePh3 (5), (C6F5)3Ge‐GePh3 (6), Ph3Ge‐GeMe2GePh3 (7)] for the synthesis of transition metal carbonyl complexes such as R3Ge‐GeAr2(R′C6H4‐η6)M(CO)3 (M = Cr, 3a–7a; M = Mo, 3b; M = W, 3c) were investigated. The target complexes were obtained in moderate yields using several different synthetic approaches. The physicochemical properties of these new derivatives were investigated by IR, UV/Vis, NMR spectroscopy, electrochemistry, and DFT calculations. The molecular structures of 3c, 4a, and 5a were studied by single‐crystal X‐ray diffraction analysis. A comparative analysis of donor and acceptor properties of aryl oligogermanes as ligands for transition metal carbonyl complexes is reported.
“…Furthermore, the similarity in electrochemical behaviours between the mono‐ and digermanium derivatives 4a and 5a indicates that the irreversibility of the oxidation for the catenated Ge complex is not due to the oxidation, and rupture, of the Ge‐Ge bond which is observed for the majority of catenated germanes , …”
A series of new carbonyl dichromium complexes bearing aryl germanes as ligands were prepared using improved approaches. The thermal reaction of Cr(CO) 6 (1) with Me 3
“…As apart of our studies of the chemistry of oligogermanium compounds (Zaitsev et al 2012(Zaitsev et al , 2013(Zaitsev et al , 2014a, the title compound was obtained and studied. For related crystal structures of silagermanes, see: Zaitsev et al (2015). The 6PE interactions are intensively discussed in Scudder & Dance (2000); Steiner (2000); Churakov et al (2005 Data collection: APEX2 (Bruker, 2013); cell refinement: SAINT (Bruker, 2013); data reduction: SAINT; program(s) used to solve structure: SHELXS2014 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015); molecular graphics: OLEX2 (Dolomanov et al, 2009); software used to prepare material for publication: OLEX2.…”
In the title compound, Ph3Ge-SiMe2(t-Bu) or C24H30GeSi, the Si and Ge atoms both possess a tetrahedral coordination environment with C—E—C (E = Si, Ge) angles in the range 104.47 (5)–114.67 (5)°. The molecule adopts an eclipsed conformation, with three torsion angles less than 29.5°. In the crystal, neighbouring molecules are combined to dimers by six T-shaped C—H⋯π interactions, forming sixfold phenyl embraces (6PE).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.