I group (L type)

mer-[Re(CO)₃{Nb(μ₂-I)₂(CO)₂(η⁶-C₆H₃Me₃)}]

Formula Unicode styled: 
mer-[Re(CO)₃{Nb(μ₂-I)₂(CO)₂(η⁶-C₆H₃Me₃)}]
Compound name(s): 
(η⁶-mesitylene)-bis(μ₂-iodo)-dicarbonyl-(rhenium-tricarbonyl)-niobium (Nb—Re)
Central atom: 
Rhenium
Attached groups: 
Nb group (X type)
I group (L type)
CO (carbonyl)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 6
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Re«V1C6O-IE18B6Z0X1L5»
[MLXZ]𝘲 class: 
[MX1L5]
MLXZ class (ENC, equivalent neutral class): 
MX1L5