इसका टेक्स्ट मैसेज भेजे: MULTIELEMENT NMR AND ELECTRON-SPIN-RESONANCE STUDY OF SOLUTIONS OF THE ALKALI-METALS NA TO CS IN N,N-DIETHYLACETAMIDE, N,N-DIPROPYLACETAMIDE, N,N-DIMETHYLPROPANAMIDE, AND TETRAMETHYLUREA