Chemistry of o-xylenediyl–metal complexes. Part 5. Silicon and tin metallacycles derived from o-C₆H₄(C̅HR)₂(R = H or SiMe₃)

Tin Organometallic Compounds: Classification and Analysis of Crystallographic and Structural Data: Part 1. Monomeric Derivatives

“…The remainder are Sn(IV) compounds with a distorted tetrahedral environment. The structure of Sn(Ph) 3 (ompa) is shown in Figure 4 as an example [87a], There are several types of chomophore: SnC 4 ; SnC 3 X; SnC 2 X 2 ; SnCI 2 XY; SnCX 3 ; as can be found in [122][123][124][125][126][127][128][129][130][131][132][133][134][135][136][137], and one monodentate and a tridentate [138] giving the SnC 4 chromophore; two alkyl groups plus a hetero bidentate (C+N) ligand, methyl [169][170][171], tert-butyl [172]; two monodentate C-donors plus heterodentate (C+S or Se) [216]; two monodentate C-donors plus a chelate (N+N) [242,243], (B+B) [247], (S+S) [278][279][280][281][282][283][284][285][286][287][288], (P+P) [289][290][291], (Se+Se) [288,294]; one chelate (C+C) plus two CI atoms [260] and one tridentate (N+N+C) plus a chlorine atom [299].…”

Mass spectrometry as an ancillary tool in metallo-organic chemical vapour deposition studies. The case of zirconium-cyclopentadienyl derivatives

“…7,8 In particular, by performing metastable ion studies on the molecular ion species, it is possible to gain information on the most energetically favoured decomposition channels of the molecule and on the relative metal-ligand bond strengths. MS has already been employed for the structural confirmation of zirconium complexes [9][10][11][12][13] but, to our knowledge, no MS data have been reported till now about the compounds under investigation here, even though different zirconium cyclopentadienyl derivatives have already been studied. Thomas and Brown 12 reported that zirconium cyclopentadienyl carbonyls give (C 5 H 5 ) 2 Zr as the most abundant fragment, while Coutts and Wailes, 13 investigating Cp 2 Zr(N 3 ) 2 , emphasized the presence of further decomposition channels of the cyclopentadienyl ring leading to C 3 H 3 , C 2 H 2 and C 2 H fragments.…”

Asymmetric activation of dialkyl zirconocenes

“…(Chloromethyl)dimethylsilane [12] (Found: C, 33.0; H, 8.6. C 3 H 9 SiCl (108.6) requires C, 33.2; H, 8.4%), Cp 2 ZrCl(CH 3 ) [13] and Cp 2 Zr(CH 3 )[CH 2 Si(CH 3 ) 3 ] [14] were prepared according to literature procedures. Microanalysis data were obtained from the University of Cape Town Microanalytical Laboratory.…”