A nuclear magnetic resonance study of molecular motion in solid tris (n-propylammonium) enneachlorodiantimonate (III) (n-C3H7NH3)3Sb2Cl9

✍ Scribed by J. Tritt-Goc; N. Piślewski; R. Goc; H. Piślewska; R. Jakubas

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 536 KB
• Volume: 10
• Category: Article
• ISSN: 0926-2040
• DOI: 10.1016/s0926-2040(97)00022-2

✦ Synopsis

Proton magnetic resonance second moment and spin-lattice relaxation time were carried out on polycrystalline tris (n-propylammonium) enneachlorodiantimonate (III), (n-C,H,NH,),Sb,Cl,, in the temperature range of lo-370 K. The second moment measurements show that the structure is not rigid on the NMR scale at 10 K, the lowest temperature studied, and that CH, and NH, groups execute rotations about C, axis. The proton spin-lattice relaxation measurements reveal two minima due to the motions of the amino and methyl groups. Analysis of the relaxation data yields the activation energy barriers of 11.0 kJ mol-' and 5.8 kJ mol-I, respectively, for the NH, and CH, groups' motion. NMR data confirm the phase transition at T, = 232 K, known from different studies. 0 1997 Elsevier Science B.V.