Metal precursorsnickel(II) acetate tetrahydrate (0.249 g, 1.00 mmol) for Na4Ni(dbg)2 formation
Linker precursorsmethyl 4-formylbenzoate -> dimethyl-4,4'-(2-hydroxyacetyl)dibenzoate -> dimethyl-4,4'-oxalyldibenzoate -> 4,4'-oxalyldibenzoic acid -> glyoxime 5 -> Na4Ni(dbg)2 -> H4Ni(dbg)2
SolventsMeOH, water, AcOH, toluene, EtOH, DCM
AdditivesKCN, NH4NO3/copper acetate literature step for 3, H2SO4:H2O 4:1, hydroxylamine, NaOH, AcOH
AtmosphereNitrogen purge and positive nitrogen pressure during Na4Ni(dbg)2 metalation; otherwise not specified.
Temperature30-35; reflux; 60-65; 60 drying
Timemulti-step; includes 15 min benzoin step, overnight reflux steps, 1 h metalation, overnight drying
Work-upFiltration, recrystallisation/sonication, acid wash, DCM wash, centrifugation as described in SI.
ActivationDried under high vacuum at 60 degrees C overnight for H4Ni(dbg)2.
Scalability contextReported isolated yields through linker steps, including 76% for H4Ni(dbg)2.