For the coordination compounds three theory explains bonding – (1) VBT (2) CFT (3) werner’s theory .
VBT – states that , metal should possess appropriate number of vacant orbital for bonding .
For Coordination number – 6 – Possible hybridisation are – sp3d2 & d2sp3
For coordination number – 4 – Possible hybridisation are – dsp2 & sp3.
This video explains Bonding in compounds having coordination compounds with the help of VBT —Click here To know more about VBT