5-coordinate: ③-●-② piano stool

[Co(η⁴-C₄H₄)(Cp)]

Formula Unicode styled: 
[Co(η⁴-C₄H₄)(Cp)]
Compound name(s): 
(Cyclopentadienyl)-(cyclobutadienyl) cobalt
Central atom: 
Cobalt
Attached groups: 
C₄H₄ (η⁴-cyclobutadiene)
Cp (η⁵-cyclopentadienyl)
Charge on central atom: 
0
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«V3C5OIIIE18B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Co(η⁴-C₄Ph₄){η⁵-C₅H₄(SiMe₃)}]

Formula Unicode styled: 
[Co(η⁴-C₄Ph₄){η⁵-C₅H₄(SiMe₃)}]
Compound name(s): 
(η⁵-Trimethylsilyl-cyclopentadienyl)-(η⁴-tetraphenyl-cyclobutadiene)-cobalt
Central atom: 
Cobalt
Attached groups: 
C₄Ph₄ (η⁴-tetraphenylcyclobutadiene)
C₅H₄(SiMe₃) (η⁵-(trimethylsilyl)cyclopentadienyl)
Charge on central atom: 
0
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«V3C5OIIIE18B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Co(η⁴-C₄Ph₄){η⁵-C₅H₄(COMe)}]

Formula Unicode styled: 
[Co(η⁴-C₄Ph₄){η⁵-C₅H₄(COMe)}]
Compound name(s): 
(η⁵-Acetyl-cyclopentadienyl)-(η⁴-tetraphenyl-cyclobutadienyl)-cobalt
Central atom: 
Cobalt
Attached groups: 
C₄Ph₄ (η⁴-tetraphenylcyclobutadiene)
C₅H₄(COMe) (η⁵-acetylcyclopentadienyl)
Charge on central atom: 
0
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«V3C5OIIIE18B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Co(η⁴-C₄Ph₄){η⁵-C₅H₄(CO₂Me)}]

Formula Unicode styled: 
[Co(η⁴-C₄Ph₄){η⁵-C₅H₄(CO₂Me)}]
Compound name(s): 
(η⁴-1,2,3,4-tetraphenylcyclobutadiene)-(η⁵-1-(methoxycarbonyl)cyclopentadienyl)-cobalt
Central atom: 
Cobalt
Attached groups: 
C₄Ph₄ (η⁴-tetraphenylcyclobutadiene)
C₅H₄(CO₂Me) (η⁵-methoxycarbonylcyclopentadienyl)
Charge on central atom: 
0
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«V3C5OIIIE18B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Co(η⁴-C₄Ph₄){η⁵-C₅H₄(CO₂H)}]

Formula Unicode styled: 
[Co(η⁴-C₄Ph₄){η⁵-C₅H₄(CO₂H)}]
Compound name(s): 
(η⁵-Carboxycyclopentadienyl)-(η⁴-tetraphenylcyclobutadiene)-cobalt
Central atom: 
Cobalt
Attached groups: 
C₄Ph₄ (η⁴-tetraphenylcyclobutadiene)
C₅H₄(CO₂H) (η⁵-carboxycyclopentadienyl)
Charge on central atom: 
0
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«V3C5OIIIE18B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Co(η⁴-C₄Ph₄)(Cp)]

Formula Unicode styled: 
[Co(η⁴-C₄Ph₄)(Cp)]
Compound name(s): 
(η⁵-Cyclopentadienyl)-(η⁴-tetraphenyl-cyclobutadiene)-cobalt
Central atom: 
Cobalt
Attached groups: 
C₄Ph₄ (η⁴-tetraphenylcyclobutadiene)
Cp (η⁵-cyclopentadienyl)
Charge on central atom: 
0
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«V3C5OIIIE18B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Co(η⁴-C₄Me₄){η⁵-C₅H₄(COMe)}]

Formula Unicode styled: 
[Co(η⁴-C₄Me₄){η⁵-C₅H₄(COMe)}]
Compound name(s): 
(η⁵-acetyl-cyclopentadienyl)-(η⁴-tetramethyl-cyclobutadienyl)-cobalt
Central atom: 
Cobalt
Attached groups: 
C₄Me₄ (η⁴-tetramethylcyclobutadiene)
C₅H₄(COMe) (η⁵-acetylcyclopentadienyl)
Charge on central atom: 
0
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«V3C5OIIIE18B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Ni(η²-NO)(Cp*)]

Formula Unicode styled: 
[Ni(η²-NO)(Cp*)]
Compound name(s): 
η²-nitrosyl-(η⁵-pentamethyl-cyclopentadienyl)-nickel
Central atom: 
Nickel
Attached groups: 
NO (η²-nitrosyl)
Cp* (η⁵-pentamethylcyclopentadienyl)
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: 
Ni«V2C5OIIE18B5Z0X2L3»
[MLXZ]𝘲 class: 
[MX2L3]
MLXZ class (ENC, equivalent neutral class): 
MX2L3

[Pt(η⁴-C₄Me₄)(η⁶-C₆Me₆)]²⊕

Formula Unicode styled: 
[Pt(η⁴-C₄Me₄)(η⁶-C₆Me₆)]²⊕
Compound name(s): 
(η⁶-Hexamethylbenzene)-(η⁴-tetramethylcyclobutadiene)-platinum(2+)
Central atom: 
Platinum
Attached groups: 
C₄Me₄ (η⁴-tetramethylcyclobutadiene)
C₆Me₆ (hexamethylbenzene)
Charge on central atom: 
2
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: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Pt«V4C5OIVE18B6Z0X2L4»2⊕
[MLXZ]𝘲 class: 
[MX2L4]2+
MLXZ class (ENC, equivalent neutral class): 
MX4L2