Transformation of a Cu
<sup>II</sup>
Thiazolo‐1,2,4‐triazine Derivative from a Metastable Coordination Network to a Monomer in Solution and Vapor Conditions
through bis(μ-chloro) linkages in a 2-propanol solution. The crystals show dynamic and irreversible structural transformation into blue crystals of [CuCl2(3a)2] (6a; Cu/3a = 1:2) not only in solution but also in vapor conditions. As 5a and 6a are ferromagnetic and paramagnetic, respectively, the transformation of 5a was monitored by magnetic susceptibility measurements in the solidstate, and χT of 5a decreased