Silenes 〉SiC〈, germenes 〉GeC〈 and stannenes 〉SnC〈

The nature of the C–As bonds in arsaalkynes: an atoms in molecules and electron localization function study

“…The C-As bond of compound (6) shows some differences with those of compound (5), that is, the characteristics of that bond are closer to those of typical C-As double bonds.…”

“…The basin variances, r 2 ( " N), and the relative fluctuations, k( " N), are included in the same table. Figures 3 and 4 show the ELF isosurfaces for compounds (1) to (5) and (6), respectively.…”

“…3 and 5 puts in evidence the similarity between the torus-like disynaptic V(C,As) basins for optimized structures of: HCN, H 2 CNH, and H 3 CNH 2 (first column); HCP, H 2 CPH, and H 3 CPH 2 (second column) and HCAs, H 2 CAsH, and H 3 CAsH 2 (third column). Core basins are represented in magenta, valence monosynaptic in red, protonated disynaptic in light blue, and valence disynaptic in green of compounds (1) to (5), and the ones present in HC:N and its homologues. The V(C,As) basin of compound (6) departs from the cylindrical symmetry that characterizes the same basin in compounds (1) to (5) (see Figure S1, Supporting Information for a better view of this basin).…”

“…The chemistry of multiple bond compounds between group 14 elements and heavier pnictogen atoms has been the subject of substantial study [1][2][3][4][5][6][7][8][9]. These species are interesting from the synthetic point of view, because of the possibility of obtaining new ligands in coordination chemistry or good precursors in material chemistry.…”

Synthesis and Structure of a 2,4‐Unsubstituted cis/trans‐1,3‐Disilacyclobutane by Dehydrofluorination of a Highly Hindered Fluorosilane

“…Since the first reaction of this type, described by Jones and Lim in 1977, [4,5] many other transient silenes have been synthesized by this route, particularly by Auner and coworkers, [6] but also by some other authors. [7] Despite the use of more and more bulky substituents, all these silenes are unstable at room temperature and lead to dimeric 1,3-disilacyclobutanes (head-to-tail dimerization), except for the stable dimesitylneopentylsilene. [8] Since in these silenes the multiply bonded carbon atom also carries at least one substituent, we were interested in whether the scope of the metalation/elimination technique could be extended to silenes without any activating or protecting groups at the carbon end of the silene unit.…”