allyl

[Ta(η³-C₈H₈)₃]⊖

Formula Unicode styled: 
[Ta(η³-C₈H₈)₃]⊖
Compound name(s): 
tris(η³-cycloocta-1,3,5-trienyl)-tantalum(1-)
Central atom: 
Tantalum
Attached groups: 
C₈H₈ (η³-cyclooctatetraenyl)
Charge on central atom: 
-1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 2
Oxidation Number (ON) (Roman numerals): 
ON: (II)
Coordination Number (CN, sum of attached group denticities): 
CN: 6
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 15
Summary of calculated classifications: 
Ta«V2C6OIIE15B6Z0X3L3»⊖
[MLXZ]𝘲 class: 
[MX3L3]-
MLXZ class (ENC, equivalent neutral class): 
MX2L4