Tin–carbon bond formation by simple addition of cyclic dienes to a bis(amino)stannylene: a mechanistic study

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

“…In the four yellow ones [28][29][30] a distorted pyramidal geometry is created by a chelated Ν donor ligand which bonds to the tin via two nitrogen atoms to form a four membered metallocycle. The mean N-Sn-N angle is 72.5(3)°, and mean Sn-N bond distance is 211.6(7) pm in three of them [28,29], and 69.1° and 225.3 (7) pm in the other [30], The corresponding Sn-C distances are almost identical (242 pm [28,29] and 241 pm [30]) with mean C-Sn-N angles of 93.5° and 95.4°, respectively.…”

Synthesis and Spectroscopic Characterization of Novel Heterotermetallic Isopropoxides: X-ray Crystal Structures of ICd{M2(OPri)9} and [{Cd(OPri)3}Ba{M2(OPri)9}]2 (M = Ti, Hf)

“…This loss of symmetry in the M 2 (OR) 9 substructure of 2 (Figure 3) is observable in the solid state 13 C CP MAS NMR spectrum (Figure 1b). The M 2 (OR) 9 structural unit is of common occurrence in alkoxide chemistry as observed in the X-ray crystal structures of ICdSn 2 (OPr i ) 9 , 8 ICdZr 2 (OPr i ) The quest for soluble alkoxides of alkaline earth metals, especially barium, has gained additional impetus due to its presence in many of the high-T c superconductors, such as YBa 2 Cu 3 O 7-x , 16 HgBa 2 CuO 4 , 17 and Ba 0.6 K 0.4 BiO 3 ,18 and also due to their potential application in the synthesis of perovskite oxide phases such as BaTiO 3 which is used in high-dielectric constant capicator materials. However, in most of the cases attempts made to synthesize well-defined homo-or heterometal alkoxides of barium have resulted in the formation of oxo complexes or high-nuclearity aggregrates.…”

Synthesis, solid-state molecular structure and solution dynamics of new alkoxy stannylene-transition metal complexes

“…The electronic and coordinative unsaturation (s 2 l 2 ) of tin in stannylenes, the heavier congeners of carbenes, is compensated either through sor p-donation, steric encumbrance and/or extension of the coordination number by binding to a transition metal moiety. 6 Stannylenes show an amphiphilic behaviour towards acids, 7 bases, [8][9][10][11][12] and oxidants [13][14][15][16][17][18] that is attributed to the hybridisation of the electron-deficient tin centre, which is regarded as being intermediate between (sp 2 ) 4 (p z ) 0 and s 2 (p x,y ) 2 (p z ) 0 . 19 Both descriptions take into account the presence of a lone pair of electrons and an empty p-orbital perpendicular to the plane formed by tin and the a-atoms of the two substituents.…”