Doubt from coordination compounds

Azimuddin_Sheikh 2018-10-11 17:38:27 UTC #1

How many total sigma bonds r there in Fe2(CO)9 ? I am getting 21 but answer given is 22 ? How and can( fe )form 7 bonds ???? @Naman @Viraj @Viraam_Rao bro

Azimuddin_Sheikh 2018-10-11 17:59:15 UTC #2

Or is there a banana bonding here ? Why ?

Viraj 2018-10-11 18:04:08 UTC #3

Structure of Fe2CO9 is sth like this
IMG_20181011_233347

So it's 6 bonds not 7..

Azimuddin_Sheikh 2018-10-11 18:23:58 UTC #4

Counting u will get 21 , but given 22 ? U know why @Viraj bro , wikipedia says its has banana bonding how ?

Azimuddin_Sheikh 2018-10-11 22:38:49 UTC #5

And somewhere given in net that it has fe -fe bond too