Mn2(CO)10 has no bridging CO ligands:it can be described (CO)5Mn-Mn(CO)5.There are two kinds of CO ligands; one CO on each Mn is coaxial with the Mn-Mn bond,and four on each manganese that are perpendicular to it (equatorial).In the stable rotamer,the two Mn(CO)5 subunits are staggered.The overall molecule thus belongs to the point group D4d,which is an uncommon symmetry.
羰基是中性配体 ,Mn、C、O分别是0、+2、-2.
Mn（CO）5 I 中Mn、C、O、I分别是+1、+2、-2、-1.