CHARGE CONTROL OF PHENOL COMPLEXATION WITH UNSATURATED-COMPOUNDS CONTAINING GROUP IVB ORGANOMETALLIC SUBSTITUENTS - INTERPRETATION OF NMR-SPECTRA OF ACETYLENIC DERIVATIVES

delta(29)Si and delta(119)Sn chemical shifts in the NMR spectra of ace tylenic derivatives Me(3)EC drop CX (E = Si or Sn; X - organic substit uents) and shifts of frequencies (Delta v) of stretching vibrations of OH groups in the IR spectra of phenol when hydrogen-bonded to these c ompounds have been analyzed. In each of two series (E = Si or Sn), the delta and Delta v values are connected by a linear relationship; this indicates that there is virtually no effect of the magnetic anisotrop y of the X substituents on the chemical shifts. It has been establishe d that the shifts of the Delta v frequencies and the delta(29)Si and d elta(119)Sn chemical shifts are the relative characteristics of the ef fective negative charge on the carbon atoms of the triple bond in Me(3 )EC drop CX compounds.