There are disclosed compounds having the formula ##STR1## wherein R and R' are selected from the group consisting of (a) substituents having the formula R.sup.1 R.sup.2 R.sup.3 C-wherein R.sup.1 is H or an alkyl group of 1 to 6 carbon atoms, and R.sup.2 and R.sup.3 are independently alkyl of 1 to 6 carbon atoms; (b) phenyl group; (c) phenyl group substituted by Br, Cl, F, alkyl group of 1 to 10 carbon atoms, or alkoxy group of 1 to 10 carbon atoms; and (d) an adamantyl group; and M is As or Sb; with the proviso that when R and R' are phenyl or substituted phenyl in which the substituents are in meta or para positions, M is As. Preferably R and R' are the same and are t-butyl, phenyl or adamantyl. The compounds display thermochromic properties.
揭示了具有以下
化学式的化合物##STR1##其中R和R'从以下组中选择:(a) 具有
化学式R.sup.1 R.sup.2 R.sup.3 C-的取代基,其中R.sup.1为H或1到6个碳原子的烷基,R.sup.2和R.sup.3分别为1到6个碳原子的烷基;(b) 苯基;(c) 由Br、Cl、F、1到10个碳原子的烷基或1到10个碳原子的烷氧基取代的苯基;和(d) 脱氢莰基;M为As或Sb;但当R和R'为苯基或取代苯基,其中取代基位于间位或对位时,M为As。最好R和R'相同且为叔丁基、苯基或脱氢莰基。这些化合物具有热致变色性能。