in reference to:
The molecular formula for sodium acetylide in each ofthe Beilstein, Gmelin, and Registry databases is C2HNa,although the former two databases consider it is made of two‘fragments’; in Registry it is a single compound with struc-ture NaCCH. On the other hand, the molecular formulaefor sodium acetate are C2H3O2.Na (Beilstein), C2H3NaO2(Gmelin), and C2H4O2.Na (Registry).
I understand from the paragraph which databases are used for sodium acetylide. On the other hand, i don't understand which databases treat sodium acetate as 2 fragments. Any help?