Tang Shouyuan, Evangelisti Luca, Velino Biagio, Caminati Walther
Dipartimento di Chimica, G. Ciamician dell'Universita, Via Selmi 2, I-40126 Bologna, Italy.
J Chem Phys. 2008 Oct 14;129(14):144301. doi: 10.1063/1.2990747.
The rotational spectra of six isotopologues of pyridine-xenon, two isotopes of the nitrogen atom ((14)N and (15)N) in pyridine with three isotopes of the rare gas atom ((129)Xe, (131)Xe, and (132)Xe) have been measured by pulsed jet Fourier transform microwave spectroscopy. The complex has a structure with the xenon atom located in the plane of symmetry perpendicular to the aromatic ring plane. Its distance from the center of mass of pyridine is 3.81 A, and it is tilted--with respect to the c principal axis of pyridine--by 7 degrees toward the N atom. The (14)N and (131)Xe nuclear quadrupole coupling constants have been determined for the isotopologues containing these nuclei. Information on the dynamics of the Xe van der Waals motions was obtained from the centrifugal distortion and from the changes in the planar moments of inertia in going from pyridine to pyridine...Xe.
通过脉冲喷射傅里叶变换微波光谱法测量了吡啶 - 氙的六种同位素异构体的转动光谱，其中吡啶中的氮原子有两种同位素（(14)N和(15)N），稀有气体原子有三种同位素（(129)Xe、(131)Xe和(132)Xe）。该配合物具有一种结构，其中氙原子位于垂直于芳环平面的对称平面内。它与吡啶质心的距离为3.81埃，并且相对于吡啶的c主轴向N原子倾斜7度。已确定了含有这些原子核的同位素异构体的(14)N和(131)Xe核四极耦合常数。从离心畸变以及从吡啶到吡啶...氙的平面转动惯量变化中获得了关于氙范德华运动动力学的信息。
