Abstract A number of new thioether and disulfide oligomers of s‐triazine have been prepared and identified. The reactions between 2,4‐diphenyl‐s‐triazine‐6‐thiol and chloro substituted‐s‐triazines are described. A suggested mechanism for the formation of 2,2′‐thiobis‐(4,6‐diphenyl‐s‐triazine) from 2,4‐diphenyl‐s‐triazine‐6‐thiol is discussed.