[Sb{Cr(CO)₅}₃]⊖

Formula Unicode styled: 
[Sb{Cr(CO)₅}₃]⊖
Compound name(s): 
tris(pentacarbonyl-chromium)-antimony(1-)
Central atom: 
Charge on formula unit (QN): 
1–
Compound type: 
Notes: 

The three metal groups each receive two electrons from the antimony in σ bonds (the metal groups are Z). The antimony receives two electrons from the three metal groups that act together as a set classified as an L π function. This takes the EN for antimony to 8.

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: 
[ML1Z3]-
MLXZ class (ENC, equivalent neutral class): 
MX3Z1
Summary of calculated classifications: 
Sb«V5C4O-IE8B4X0L1Z3»
𝘥-electron configuration = 𝘮 – VN: 
𝘥-electron configuration = 𝘮 – ON: 
𝘥-electron configuration = 𝘮 – VN – 𝘲 from [MLXZ]𝘲: 
Attached atoms: 
Cr3
Phase: 
InChIKey (see www.inchi-trust.org): 
CRTHFAWDLZWCQG-UHFFFAOYSA-N