=CH₂ (methylidene)

[Re(=CH₂)(PPh₃)(NO)(Cp*)]⊕

Formula Unicode styled: 
[Re(=CH₂)(PPh₃)(NO)(Cp*)]⊕
Compound name(s): 
(η⁵-Pentamethyl-cyclopentadienyl)-methylidene-nitrosyl-triphenylphosphino-rhenium(1+)
Central atom: 
Rhenium
Attached groups: 
=CH₂ (methylidene)
PPh₃ (triphenylphosphane)
NO (nitrosyl, linear)
Cp* (η⁵-pentamethylcyclopentadienyl)
Charge on central atom: 
1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 7
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: 
Re«V7C6OIIIE18B9X4L4Z1»⊕
[MLXZ]𝘲 class: 
[MX4L4Z1]+
MLXZ class (ENC, equivalent neutral class): 
MX7L2

[Ta(Me)(=CH₂)(Cp)₂]

Formula Unicode styled: 
[Ta(Me)(=CH₂)(Cp)₂]
Compound name(s): 
bis(η-Cyclopentadienyl)-methyl-methylene-tantalum
Central atom: 
Tantalum
Attached groups: 
Me (methyl)
=CH₂ (methylidene)
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