P₄ (Tetra-phosphacyclobutadiene)

[Nb(CO)₂(Cp*)(P₄)]

Formula Unicode styled: 
[Nb(CO)₂(Cp*)(P₄)]
Compound name(s): 
(η⁵-Pentamethyl-cyclopentadienyl)-dicarbonyl-(eta⁴-cyclotetraphosphide)-niobium
Central atom: 
Niobium
Attached groups: 
CO (carbonyl)
Cp* (η⁵-pentamethylcyclopentadienyl)
P₄ (Tetra-phosphacyclobutadiene)
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: 7
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Nb«V1C7OIE18B7Z0X1L6»
[MLXZ]𝘲 class: 
[MX1L6]
MLXZ class (ENC, equivalent neutral class): 
MX1L6