Potassium 1 -acetonyl-2,4,6-trinitrocyclohexa-2,5-dienate

Vc// coupling of the C atom marked with an asterisk in A is the intramolecular hydrogen bonding proton. This coupling also permits straightforward assignment of the closely spaced signals at 5c = 118.2 (C-3) and 119.2 (C-5). 

Signal assignment is then no problem the C atoms which are bonded to the nitro groups C-2,6 and C-4 are clearly distinguishable in the C NMR spectrum by the intensities of their signals. 

13C chemical shifts Sc CH multiplicities, CH coupling constants (Hz), coupling protons  

The l3C NMR spectrum shows from the signals at 5C = 205.6 (singlet), 47.0 (triplet) and 29.8 (quartet) that the acetonyl residue with the carbonyl group intact (5C = 205.6) is bonded to the 

The cross signals in the INADEQUATE plot show the CC bonds for two part structures A and B, Taking the 13C signal at 8c = 174.1 as the starting point the hydrocarbon skeleton A and additional C3 chain B result. 

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