C₄H₆ (σ²-η²-butadiene)

[Co(σ²-η²-C₄H₆)₂]⊖

Formula Unicode styled: 
[Co(σ²-η²-C₄H₆)₂]⊖
Compound name(s): 
bis(η⁴-1,3-butadiene)-cobalt(1-)
Central atom: 
Cobalt
Attached groups: 
C₄H₆ (σ²-η²-butadiene)
Charge on central atom: 
-1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 3
Oxidation Number (ON) (Roman numerals): 
ON: (III)
Coordination Number (CN, sum of attached group denticities): 
CN: 6
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Co«V3C6OIIIE18B6Z0X4L2»⊖
[MLXZ]𝘲 class: 
[MX4L2]-
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Mo(σ²-η²-C₄H₆)₃]

Formula Unicode styled: 
[Mo(σ²-η²-C₄H₆)₃]
Compound name(s): 
tris(η-Butadiene)-molybdenum
Central atom: 
Molybdenum
Attached groups: 
C₄H₆ (σ²-η²-butadiene)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 6
Oxidation Number (ON) (Roman numerals): 
ON: (VI)
Coordination Number (CN, sum of attached group denticities): 
CN: 6
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Mo«V6C6OVIE18B9Z0X6L3»
[MLXZ]𝘲 class: 
[MX6L3]
MLXZ class (ENC, equivalent neutral class): 
MX6L3

[Hf(σ²-η²-C₄H₆)₂(Dmpe)]

Formula Unicode styled: 
[Hf(σ²-η²-C₄H₆)₂(Dmpe)]
Compound name(s): 
bis(η-Butadiene)-(1,2-bis(dimethylphosphino)-ethane)-hafnium
Central atom: 
Hafnium
Attached groups: 
C₄H₆ (σ²-η²-butadiene)
Dmpe (1,2-bis-(dimethylphosphino)ethane)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (IV)
Coordination Number (CN, sum of attached group denticities): 
CN: 8
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 16
Summary of calculated classifications: 
Hf«V4C8OIVE16B8Z0X4L4»
[MLXZ]𝘲 class: 
[MX4L4]
MLXZ class (ENC, equivalent neutral class): 
MX4L4