New Multinuclear Experiments on Solid Organotin Fluorides

A set of two-dimensional solid-state NMR experiments providing topological information for structure refinement of TMP-GaPO

“…Since 1990, new experimental schemes such as SEDRA, 8 RFDR, 9 DRAMA, 10 -12 HORROR, 13 MELODRAMA, 14 C7, 15 DRAWS 16 and others 17 -20 have allowed the recovery of the homonuclear dipolar interaction while in MAS. Techniques for recovery of the heteronuclear dipolar interaction, REDOR, 21 TEDOR, 22,23 SFAM 24,25 and CP-HETCOR, 26 have also been developed. All these schemes present different characteristics as well as different domains of applicability, making possible, in numerous cases, the study of the local topology of materials by the study of the atomic through-space connectivities.…”

A relativistic DFT study of one-bond fluorine-X indirect spin–spin coupling tensors

“…79, but for a related molecule the error in R eff was estimated to be š400 Hz; this would lead to an error of š1200 Hz in J 119 Sn, F .…”

Covalent Bonds in α‐SnF2 Monitored by J‐Couplings in Solid‐State NMR Spectra

“…Wiley-VCH ZAAC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 The shortest distances for heteronuclear and homonuclear pairs of nuclei reported for the X-ray structure [1] As a third contribution to line broadening, J-couplings have to be taken into account for 119 Sn, since it has been documented previously [9][10][11][12][13][14][15][16][17][18][19][20][21] that they may also be of the order of kHz. In fact, the J-couplings for 119 Sn can be so large that it has been possible to determine the anisotropy of this interaction in some organo-tin compounds [14] by using off-magic angle spinning.…”

“…Unlike dipolar couplings, which act through space, J-couplings are mediated by covalent bonds, and are difficult to observe in solid-state NMR, because they are usually much smaller than dipolar couplings [6][7][8]. For 119 Sn however, J-couplings tend to be comparatively large (in the range of kHz), and have been reported before in the literature for a variety of compounds [9][10][11][12][13][14][15][16][17][18][19][20][21]. The existence of J-couplings in α-SnF 2 shown here is further evidence for the existence of covalent Sn-F bonds in tin(II) fluoride.…”