29Si-H couplings

Si(2) resonances are split into doublets by 1J(Si(2)H(b . The complex splitting patterns of the single resonance lines arise from long-range 29Si- H- couplings. 

Hutton, H. M., Bock, E., Schaefer, T. Solvent Dependence of 29Si-19F Coupling Constant in Silicontetrafluoride. The Importance of Intermolecular Dispersion Interactions. Can. J. Chem. 44, 2772 (1966). 

Useful information can sometimes be obtained from JX29Si- H) coupling constants. It has been shown that their magnitude depends chiefly on the Fermi contact term, and hence on the degree of s character in the Si-H bond (149). Exceptionally low values of the (29Si-H)... 

Besides their use for line assignments93,177, 29Si— H 2D correlations can also be used to determine coupling constants ["/(29Si—X) and "/( H—X)] involving another isotope... 

Fig. 1. 99.6 MHz 29si H NMR spectrum of Me2Si(C=C-Me)2 in CDCI3 (1 transient, acquisition time 20 s full-width in half-height of the central signal is 0.030 Hz). The satellites owing to Si- C spin-spin coupling are marked [see Scheme 15 for isotope-induced chemical shifts Adapted from ref. 105.

Fig.39a-c Silicon-29 and proton spectra of diphenylsilane in C6D6. a INEPT spectrum with complete proton decoupling, b proton-coupled INEPT spectrum ( h 201 Hz) the fine structure is due to coupling with thearomatic protons, c proton spectrum showing 29Si satellites for the SiH protons)... 

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