Cr
Charge
C.N.
Spin
I.R./Å
+2
6
l
0.73
6
h
0.80
+3
6
0.615
+4
4
0.41
6
0.55
+5
4
0.345
6
0.49
8
0.57
+6
4
0.26
6
0.44