[C(O)₃]²⊖

Formula Unicode styled: 
[C(O)₃]²⊖
Compound name(s): 
carbonate(2-)
Central atom: 
Charge on formula unit (QN): 
2–
Attached groups: 
Compound type: 
Notes: 

The three O groups are presented as a set: O₃ (trioxo X₃L Ⓢ). Each X denotes a σ-bond from an O⊖ group and the L group denotes a 4-centre, 2 electron π-bond.

Valence Number (VN) = 𝘹 + 2𝘻 : 
Coordination Number (CN, sum of attached group denticities): 
Oxidation Number (ON) (Roman numerals): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Bond number (BN) = 𝘹 + 𝘭 + 𝘻: 
4
[MLXZ]𝘲 class: 
[MX3L1]+
MLXZ class (ENC, equivalent neutral class): 
MX4
Summary of calculated classifications: 
C«V4C3OIVE8B4Z0X3L1»
𝘥-electron configuration = 𝘮 – VN: 
𝘥-electron configuration = 𝘮 – ON: 
𝘥-electron configuration = 𝘮 – VN – 𝘲 from [MLXZ]𝘲: 
Attached atoms: 
O3
Phase: 
InChIKey (see www.inchi-trust.org): 
DPFFXSPEODLYOH-UHFFFAOYSA-N