196880-32-7

Upstream product

• 196880-28-1 Ge((C₆H₁₁)NC(CH₃)N(C₆H₁₁))(N(Si(CH₃)3)2) 
• 7782-49-2 selenium 
• 286386-26-3 Ge((C₆H₁₁)NC(CH₃)N(C₆H₁₁))(N(Si(CH₃)3)2)(SeC₆H₅)2 

Relevant academic research and scientific papers

Oxidative addition to M(n) (M = Ge, Sn) amidinate complexes: Routes to group 14 chalcogenolates with hypervalent coordination environments

Oxidative addition of diphenyl dichalcogenides, PhE-EPh (E = S, Se) to Ge(n) and Sn(n) amidinate complexes is reported. In the case of the bis(alkylamidinato)Ge complexes, Ge(CyNC(R')NCy) (Cy = cyclohexyl; R' = Me, 'Bu), six coordinate Ge(iv) compounds were isolated and the structure of (PhS)2Ge(CyNC(Me)NCy) (10) was confirmed by single crystal X-ray diffraction analysis. Mixed amidinato-amido species, M(CyNC(R')NCy)[N(SiMe3)2] (M = Ge, Sn; R = Me, 'Bu), react in a similar manner to yield novel bis(phenylchalcogenolate) complexes of Sn and Ge. Spectroscopic features and, in the case of (PhSe)2Ge(CyNC(Me)NCy)[N(SiMe3)2] (13), a single crystal structural analysis indicate that this ligand environment appears to favor Ge(iv) complexes with a strong disposition towards a tetrahedral geometry. In these cases, a five coordinate environment for the metal center is avoided by one of the amidinate ligands exhibiting a monodentate coordination mode, which preserves the pseudo-tetrahedral metal coordination geometry. These observations contrast with the Sn(n/iv) analogues which exhibit no such tendency. For example the single crystal structure of (PhS)2Sn(CyNC(Me)NCy)[N(SiMe3)2] (14) displays a bidentate ligand and a five coordinate metal coordination geometry. Complex 13 reacts with elemental Se to generate the terminal germanium selenide and regenerate PhSeSePh. Concomitant with this reaction is a rearrangement of the previously monodentate amidinate ligand to a bidentate coordination mode. The Royal Society of Chemistry 2000.

Facile formation of rare terminal chalcogenido germanium complexes with alkylamidinates as supporting ligands

The first characterized amidinate complexes of Ge have been prepared using alkylamidinates as ancillary ligands. Spectroscopic and structural characterization of the two complexes, (CyNC(Me)NCy)2Ge(II) (1) and (CyNC((t)Bu)NCy)2Ge(II) (2) (Cy = cyclohexyl), revealed that the Ge coordination geometry is distorted tetrahedral in which one of the vertices is occupied by a lone pair of electrons. Both 1 and 2 exhibited one bidentate and one monodentate ('dangling') ligand. Rapid oxidative addition of chalcogen atom sources (styrene sulfide and Se) to these complexes resulted in a series of rare terminal chalcogenido complexes with the formulas (CyNC(R)NCy)2Ge=Ch [R = Me, Ch = S (3), Se(4); R = (t)Bu, Ch = S (5), Se(6)]. The spectroscopic data and X-ray structure of G revealed a terminal Ge=Se complex. Mixed amidinato-amido analogues were similarly obtained. For example, [(CyNC(R)NCy)Ge(II)[N(SiMe3)2] (R = Me, (t)Bu) react to yield the corresponding terminal chalcogenido complexes. In the case of [(CyNC(Me)NCy)Ge(II)[N(SiMe3)2]Se (10), a crystallographic study confirmed the presence of a terminal Ge=Se bond.