Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: The optical absorption spectrum of pyridine in hexane contains three bands at the wavelengths of 195 nm (π → π* transition, molar absorptivity ε = 7500 L·mol−1·cm−1), 251 nm (π → π* transition, ε = 2000 L·mol−1·cm−1) and 270 nm (n → π* transition, ε = 450 L·mol−1·cm−1). 1H nuclear magnetic resonance (NMR) spectrum ye pyridine ine zviratidzo zvitatu zvine chiyero chakasimba che 2: 1: 2 chinoenderana nemapurotoni matatu akasiyana emakemikari ari mumorekuru. Zviratidzo izvi zvinobva muα-protons (nzvimbo 2 ne6, chemical shift 8.5 ppm), γ-proton (nzvimbo 4, 7.5 ppm) uye β-protons (nzvimbo 3 ne5, 7.1 ppm). Carbon analogue ye pyridine, benzene, ine chiratidzo chimwe bedzi cheproton pa7.27 ppm. Kuchinja kukuru kwemakemikari e α- uye γ-proton zvichienzaniswa ne benzene kunokonzerwa nekuderera kwe electron density mu α- uye γ-nzvimbo, iyo inogona kutorwa kubva kune zvivakwa zve resonance. Mamiriro ezvinhu akafanana nokuda kwe13C NMR spectra ye pyridine uye benzene: pyridine inoratidza katatu pa δ(α-C) = 150 ppm, δ(β-C) = 124 ppm uye δ(γ-C) = 136 ppm, nepo benzene ine mutsetse mumwe chete pa 129 ppm. Shanduko dzose dzinotsanangurwa nokuda kwezvinhu zvisina solvent. Pyridine inowanzonzverwa negasi chromatography uye nzira dze mass spectrometry.  Mubvunzo: Mabhendi mangani ari mupuridine spectrum mukati mehexane?
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