Tetrazine-argon complexes

Van der Waals complexes were observed between two molecules of 1,2,4,5-tetrazine (la) and helium, argon, krypton, xenon, hydrogen, water, hydrochloric acid, acetylene or benzene 28 36- 396-420 jn coi,j environment of a jet expansion. In favorable systems it has been possible to determine the ground and excited state geometry of the cluster by laser spectroscopy. From these structures, it has been found that 1,2,4,5-tetrazine possesses a number of different binding sites. Helium and argon bind to the equivalent sites above and below the ring.28-30 The predominant interaction in these clusters is presumably the attractive dispersion force. 

Six symmetrically disubstituted derivatives of r-tetrazine have been studied by linear dichroism spectroscopy in the UV-Vis region, magnetic circular dichroism spectroscopy, and theoretical calculations of structures and spectra <1995CPH(200)201>. A detailed discussion of the sensitivity and of the optothermal detection scheme for the study of nonfluorescing excited states of the r-tetrazine-argon van der Waals complex has been presented <2000MI183>. 

It has been shown that the relaxation of vibrational levels of the tetrazine-argon complex is sequential (IVR prior to VP). It would be important to know whether such a behavior is characteristic for a large class of... 

We have studied the vibrational energy flow in photoexcited van der Waals complexes T Ar of s-tetrazine and argon. The aim of this paper is to present experimental information about the coupling among the van der Waals vibrational modes in T Ar and about the interaction between ring modes and vdW vibrations. 

Very few experiments providing direct information about the pathways of intramolecular energy flow in van der Waals complexes have been reported to date. In most cases studied so far, distinct channels for IVR and vibrational predissociation (VP) could not be detected separately. Among the polyatomic van der Waals complexes the cluster T Ar of s-tetrazine and argon is one of the few favourable exceptions. It exhibits several channels for... 

Tetrazine-argon van der Waals complexes were produced by expanding s-tetrazine seeded in argon at a pressure of 1.2 bar through a 100 pm orifice into a vacuum chamber which was evacuated by two roots pumps (500... 

Amino-l,2,4,5-tetrazine - argon (1/1) (weakly bound complex)... 

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