caa a22 4500 467993203 CHVBK 20180323112550.0 cr unu---uuuuu 170328e19900501xx s 000 0 eng 10.1007/BF00487419 doi (NATIONALLICENCE)springer-10.1007/BF00487419 Heteroorganic derivatives of furan. 65. Effect of substituents on shielding of 1H, 13C, and 29Si and 29Si-13C spin-spin coupling constants in NMR spectra of 2-substituted furans and 5-trimethylsilylfurans [Elektronische Daten] [Yu. Popelis, É. Liepin'sh, Z. Bruveris, É. Lukevits] The results of an investigation of 2-substituted furans and 5-trimethylsilylfurans by NMR spectroscopy and the CNDO/2 method showed that the chemical shifts of the different nuclei do not correlate sufficiently clearly with the calculated charges because of an additional change in the electron density under the influence of a π-d interaction. The 13C-29Si direct spin-spin coupling constants (SSCC) are less sensitive to this interaction, since they depend primarily on the inductive effects of the substituents. Plenum Publishing Corporation, 1990 Popelis Yu Institute of Organic Synthesis, Latvian Academy of Sciences, 226006, Riga aut Liepin'sh É. Institute of Organic Synthesis, Latvian Academy of Sciences, 226006, Riga aut Bruveris Z. Institute of Organic Synthesis, Latvian Academy of Sciences, 226006, Riga aut Lukevits É. Institute of Organic Synthesis, Latvian Academy of Sciences, 226006, Riga aut Chemistry of Heterocyclic Compounds Kluwer Academic Publishers-Plenum Publishers 26/5(1990-05-01), 495-502 0009-3122 26:5<495 1990 26 10593 https://doi.org/10.1007/BF00487419 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00487419 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Popelis Yu Institute of Organic Synthesis, Latvian Academy of Sciences, 226006, Riga aut NATIONALLICENCE 700 1- Liepin'sh É. Institute of Organic Synthesis, Latvian Academy of Sciences, 226006, Riga aut NATIONALLICENCE 700 1- Bruveris Z. Institute of Organic Synthesis, Latvian Academy of Sciences, 226006, Riga aut NATIONALLICENCE 700 1- Lukevits É. Institute of Organic Synthesis, Latvian Academy of Sciences, 226006, Riga aut NATIONALLICENCE 773 0- Chemistry of Heterocyclic Compounds Kluwer Academic Publishers-Plenum Publishers 26/5(1990-05-01), 495-502 0009-3122 26:5<495 1990 26 10593 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer