Magnesium compounds lead to 1,4-addition in the first case and to 1,2-addition in the Second and third ones. Lithium compounds lead to the same compounds but also produce, in the second and third cases, compounds resulting from additions 4,1 and 4,3 respectively. ... Les magnésiens ont un comportement caractéristique vis á vis de chacun des trois types de structure: addition 1,4 dans le premier cas, addition 1,2 dans les second et troisiéme cas. Les lithiens, tout ...
