give product and mechanism

2..does cyclobutadienyl dianion has resonance stabilised structure...plz give its structure .....in answer its given as no

this rxn will not take place

i agree with aditya.1st rkn itself doesn't occur. two reasons fr it :

i) there's no acidic hydrogen to be extracted out by NH₂^-

ii) if the triple bond splits , then unstable vinylic charges occur.