Benzamidinatokomplexe mit Haupt‐ und Nebengruppen‐Elementen – Strukturen von PhC(NSiMe ₃ ) ₂ TiCl ₂ und PhC(NSiMe ₃ ) ₂ MoO ₂

Abstract

PhC (NSiMe3) (NSiMe3hLi (3 b) reacts with SiC14, SnC14, Me,SnClz, PhzSnCl,, TiCI4, Zrcf,, MOO&&, and W02C12 with formation of LiCl to yield the new amidinato complexes 4a-f, 5a, and 5b. The Xray structure analyses of 4e and 5a are reported.

Highlights in the Renaissance of Amidometal Chemistry

“…[34] In addition to alkoxy ligands, amido ligands are especially good since they fulfill the requirement for effective steric shielding. Examples are the silyl-substituted benzamidinato ligands first described by Dehnicke et al [35] and Roesky et al [36] The foundations of lanthanoid chemistry were developed mainly by Edelmann et al [13,37] During these investigations it was demonstrated that in the case of central f element ions such ligands represent a steric equivalent to Cp ligands. [13,38] Comprehensive spectroscopic measurements on tris(benzamidinato)-and tris(cyclopentadienyl)lanthanoid complexes also confirm an electronic equivalence if the central Ln atom possesses a low electron affinity.…”

Amidinatokomplexe von Bor, Aluminium, Gallium, Indium und Zinn Die Kristallstrukturen von Ph-C(NSiMe3)2AICI2 und Ph-C(NSiMe3)2SnCl3 / Amidinato Complexes of Boron, Aluminium, Gallium, Indium, and Tin The Crystal Structures of Ph-C(NSiMe3)2AlCl2 and Ph-C(NSiMe3)2SnCl3

“…Hauptgruppe sowie über ein Beispiel von Zinn(IV). Von Roesky und Mitarbeitern wurde soeben über Umsetzungen von Ph-C(NSiMe 3 ) 2 Li • OEt 2 mit einigen Metallchloriden berichtet, die auch zu Amidinatokomplexen geführt haben [8]. Die Ergebnisse weichen interessanterweise in manchen Fällen von den von uns untersuchten Reaktionen mit N,N,N'-Tris(trimethylsilyl)benzamidin ab.…”

Bis(amidinate) Complexes of Silicon and Germanium

“…Si value of Ϫ101.9 for the only other known amidinate silicon derivative, PhC(NSiMe 3 ) 2 SiCl 3 [14] . A report on structural investigations of two other silicon amidinate derivatives is currently in press [13] .…”