In†Situ Raman Monitoring of Silver(I)-Aided Laser-Driven Cleavage Reaction of Cyclobutane.

The cyclobutane cleavage reaction is an important process and has received continuous interest. Herein, we demonstrate the visible laser-driven cleavage reaction of cyclobutane in crystal form by using in situ Raman spectroscopy. Silver(I) coordination-induced strain and thermal effects from the laser irradiation are the two main driving forces for the cleavage of cyclobutane crystals. This work may open up a new avenue for studying cyclobutane cleavage reactions, as compared to the conventional routes using ex situ techniques.

[N-(5-Bromo-2-oxidobenzyl-idene)-l-valin-ato-κO,N,O']diethyl-tin(IV).

The Sn atom of the title compound, [Sn(C(2)H(5))(2)(C(12)H(12)BrNO(3))], is in a distorted SnNC(2)O(2) trigonal-bipyramidal geometry and forms five- and six-membered chelate rings with the tridentate ligand. One C atom of one ethyl group is disordered with site occupancies of 0.61 (3):0.39 (3).

In situ Raman monitoring of [2+2] cycloaddition of pyridine substituted olefins induced by visible laser.

Visible laser induced [2+2] cycloaddition of solid-state pyridine substituted olefins into cyclobutane has been monitored by an in situ Raman technique. The laser power and wavelength can dramatically alter the reaction kinetics, as a prior melting process (heating from laser irradiation) is required for this [2+2] photoreaction.