what is three centre two electron bond?

In a 'three center two-electron bond' the two electrons are 'shared' by three separate nuclei. This happens usually with elements that can form electron-deficient bonds. The simplest example of this is Diborane (B2H6). As the probability distribution of this bond is shaped as a banana it is also known as a banana bond.
The simplest example of this is Diborane (B2H6). As the probability distribution of this bond is shaped as a banana it is also known as a banana bond. In a 'three center two-electron bond' the two electrons are 'shared' by three separate nuclei. This happens usually with elements that can form electron deficient bond.