in an addition of conjugated diene, 1,2-addition occurs under kinetic control and 1,4-addition occurs under thermodynamic control. I thought 1,2-addition occurs at room temperature, and 1,4-addition occurs at high temperature. Am I wrong? then at 25 degree celcius, which occurs? I thought 1,2-addition, but Achiever test #2 (question #76) said 1,4-addition. What is the border line of temperature of those two? 0 degree celcius?