Difference between coordination entity and coordination sphere What’s difference between coordination entity and coordination sphere? Can they be same? Here in my book same example is given for both coordination entity and coordination sphere. 




Please help.

Source:http://ncert.nic.in/ncerts/l/lech109.pdf

Section 9.2 Definitions of Some
Important Terms Pertaining to Coordination Compounds 

Page no. 240-241
Coordination entity is the part of complex compound having central atom surrounded with the number of secondary linkage.
But,if this entity is written along with charge on it ,then it is called coordination sphere
For example  [Fe(CN)6]4- is a coordination sphere while Fe(CN)6 is the coordination entity