=CHMe (methylmethylidene)

[Fe(=CHMe)(Dppe-κ²P)(Cp)]⊕

Formula Unicode styled: 
[Fe(=CHMe)(Dppe-κ²P)(Cp)]⊕
Compound name(s): 
(η⁵-Pentamethyl-cyclopentadienyl)-(bis(diphenylphosphino)ethane)-(ethylidene)-iron(1+)
Central atom: 
Iron
Attached groups: 
=CHMe (methylmethylidene)
Dppe (1,2-bis-(diphenylphosphino)ethane-κ²P)
Cp (η⁵-cyclopentadienyl)
Charge on central atom: 
1
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: 6
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Fe«V4C6OIVE18B7Z0X3L4»⊕
[MLXZ]𝘲 class: 
[MX3L4]+
MLXZ class (ENC, equivalent neutral class): 
MX4L3

[Ta(I)(=CHMe)(Cp)₂]

Formula Unicode styled: 
[Ta(I)(=CHMe)(Cp)₂]
Compound name(s): 
bis(η-Cyclopentadienyl)-ethylidene-iodo-tantalum
Central atom: 
Tantalum
Attached groups: 
I (iodo)
=CHMe (methylmethylidene)
Cp (η⁵-cyclopentadienyl)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 5
Oxidation Number (ON) (Roman numerals): 
ON: (V)
Coordination Number (CN, sum of attached group denticities): 
CN: 8
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Ta«V5C8OVE18B9Z0X5L4»
[MLXZ]𝘲 class: 
[MX5L4]
MLXZ class (ENC, equivalent neutral class): 
MX5L4