i am talking about datacenter objects in Vcenter, is it possible?
No, vMotion across datacenter objects in vCenter is not possible.
You could however disconnect the Host from the vCenter and add it again, selecting the other Datacenter. ( use with care! I did it one and with my setup the VMs kept running because the host was not part of a cluster and the IP configuration stayed the same in the other Datacenter Object. Might generate some trouble in more complex configurations )
Regards