5-coordinate: ②-●-3 piano stool

[Fe(η⁴-C₄Ph₄)(η⁶-C₇H₈)]

Formula Unicode styled: 
[Fe(η⁴-C₄Ph₄)(η⁶-C₇H₈)]
Compound name(s): 
(η⁴-Tetraphenylcyclobutadiene)-(η⁶-toluene)-iron
Central atom: 
Iron
Attached groups: 
C₄Ph₄ (η⁴-tetraphenylcyclobutadiene)
C₇H₈ (toluene)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 2
Oxidation Number (ON) (Roman numerals): 
ON: (II)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Fe«V2C5OIIE18B6Z0X2L4»
[MLXZ]𝘲 class: 
[MX2L4]
MLXZ class (ENC, equivalent neutral class): 
MX2L4

[Fe(CO)₃(η⁴-C₄Ph₄)]

Formula Unicode styled: 
[Fe(CO)₃(η⁴-C₄Ph₄)]
Compound name(s): 
(Tetraphenylcyclobutadiene)-tricarbonyl-iron
Central atom: 
Iron
Attached groups: 
CO (carbonyl)
C₄Ph₄ (η⁴-tetraphenylcyclobutadiene)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 2
Oxidation Number (ON) (Roman numerals): 
ON: (II)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Fe«V2C5OIIE18B6Z0X2L4»
[MLXZ]𝘲 class: 
[MX2L4]
MLXZ class (ENC, equivalent neutral class): 
MX2L4

[Fe(CO)₂(NO)(η³-C₃Ph₃)]

Formula Unicode styled: 
[Fe(CO)₂(NO)(η³-C₃Ph₃)]
Compound name(s): 
Dicarbonyl-nitrosyl-(η³-1,2,3-triphenylcyclopropenyl)-iron
Central atom: 
Iron
Attached groups: 
CO (carbonyl)
NO (nitrosyl, linear)
C₃Ph₃ (η³-triphenylcyclopropenyl)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 6
Oxidation Number (ON) (Roman numerals): 
ON: (II)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Fe«V6C5OIIE18B8X4L3Z1»
[MLXZ]𝘲 class: 
[MX4L3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX6L2

[Fe(CO){P(OMe)₃}₂(η⁴-C₄Ph₄)]⊕

Formula Unicode styled: 
[Fe(CO){P(OMe)₃}₂(η⁴-C₄Ph₄)]⊕
Compound name(s): 
Carbonyl-(η⁴-tetraphenylcyclobutadiene)-bis(trimethylphosphite)-iron(1+)
Central atom: 
Iron
Attached groups: 
CO (carbonyl)
P(OMe)₃ (trimethylphosphite)
C₄Ph₄ (η⁴-tetraphenylcyclobutadiene)
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: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 17
Summary of calculated classifications: 
Fe«V3C5OIIIE17B6Z0X2L4»⊕
[MLXZ]𝘲 class: 
[MX2L4]+
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Fe(CO){P(OMe)₃}₂(η⁴-C₄Ph₄)]

Formula Unicode styled: 
[Fe(CO){P(OMe)₃}₂(η⁴-C₄Ph₄)]
Compound name(s): 
Carbonyl-(η⁴-tetraphenylcyclobutadiene)-bis(trimethylphosphite)-iron
Central atom: 
Iron
Attached groups: 
CO (carbonyl)
P(OMe)₃ (trimethylphosphite)
C₄Ph₄ (η⁴-tetraphenylcyclobutadiene)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 2
Oxidation Number (ON) (Roman numerals): 
ON: (II)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Fe«V2C5OIIE18B6Z0X2L4»
[MLXZ]𝘲 class: 
[MX2L4]
MLXZ class (ENC, equivalent neutral class): 
MX2L4

[Fe(CO)(η⁴-C₄H₄)(Dppe-κ²P)]

Formula Unicode styled: 
[Fe(CO)(η⁴-C₄H₄)(Dppe-κ²P)]
Compound name(s): 
Carbonyl-cyclobutadiene-(1,2-bis(diphenylphosphino)ethane)-iron
Central atom: 
Iron
Attached groups: 
CO (carbonyl)
C₄H₄ (η⁴-cyclobutadiene)
Dppe (1,2-bis-(diphenylphosphino)ethane-κ²P)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 2
Oxidation Number (ON) (Roman numerals): 
ON: (II)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Fe«V2C5OIIE18B6Z0X2L4»
[MLXZ]𝘲 class: 
[MX2L4]
MLXZ class (ENC, equivalent neutral class): 
MX2L4

[Co(NCMe)₃(η⁴-C₄Me₄)]⊕

Formula Unicode styled: 
[Co(NCMe)₃(η⁴-C₄Me₄)]⊕
Compound name(s): 
(η⁴-1,2,3,4-Tetramethylcyclobutadiene)-tris(acetonitrile)-cobalt(1+)
Central atom: 
Cobalt
Attached groups: 
NCMe (acetonitrile)
C₄Me₄ (η⁴-tetramethylcyclobutadiene)
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: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Co«V3C5OIIIE18B6Z0X2L4»⊕
[MLXZ]𝘲 class: 
[MX2L4]+
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Co(CO)₃(η⁴-C₄Me₄)]⊕

Formula Unicode styled: 
[Co(CO)₃(η⁴-C₄Me₄)]⊕
Compound name(s): 
(η⁴-1,2,3,4-Tetramethylcyclobutadiene)-tricarbonyl-cobalt(1+)
Central atom: 
Cobalt
Attached groups: 
CO (carbonyl)
C₄Me₄ (η⁴-tetramethylcyclobutadiene)
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: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Co«V3C5OIIIE18B6Z0X2L4»⊕
[MLXZ]𝘲 class: 
[MX2L4]+
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Mn(CO)₂(NO)(η⁴-C₄Ph₄)]

Formula Unicode styled: 
[Mn(CO)₂(NO)(η⁴-C₄Ph₄)]
Compound name(s): 
(η-Tetraphenylcyclobutadiene)-dicarbonyl-nitrosyl-manganese
Central atom: 
Manganese
Attached groups: 
CO (carbonyl)
NO (nitrosyl, linear)
C₄Ph₄ (η⁴-tetraphenylcyclobutadiene)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 5
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Mn«V5C5OIE18B8X3L4Z1»
[MLXZ]𝘲 class: 
[MX3L4Z1]
MLXZ class (ENC, equivalent neutral class): 
MX5L3