. refers to the contraction (dot product) of two general tensors (array, list, matrix, vector). For example:
a.b
This will contract the last index of a with the first index of b. Scalar multiplication, what you want, can be written in (at least) 3 ways:
1{1,2,3}
1*{1,2,3}
Times[1,{1,2,3}]