6-coordinate: ③-●-3 piano stool

6-coordinate: 3-3 piano stool
6-coordinate: ③-●-3 piano stool

[Ir(H){Ta(H)(Cp)}(Cp*)]₂

Formula Unicode styled: 
[Ir(H){Ta(H)(Cp)}(Cp*)]₂
Compound name(s): 
bis-[hydrido-{μ₂-(hydrido-η⁵-pentamethylcyclopentadienyl-tantalum)}₂-(η⁵-pentamethylcyclopentadienyl)-iridium] (Ir—Ir)
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Ir«V5C7OOE18B7Z0X5L2»
[MLXZ]𝘲 class: 
[MX5L2]
MLXZ class (ENC, equivalent neutral class): 
MX5L2

[V₂(μ₂-S)₂(μ₂-Se₂)(Cp*)₂]

Formula Unicode styled: 
[V₂(μ₂-S)₂(μ₂-Se₂)(Cp*)₂]
Compound name(s): 
bis(μ₂-sulfido)-(μ₂-diselenido)-bis(η⁵-pentamethyl-cyclopentadienyl)-di-vanadium
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
V«V4C6OIVE13B6Z0X4L2»
[MLXZ]𝘲 class: 
[MX4L2]
MLXZ class (ENC, equivalent neutral class): 
MX4L2

[Ta(μ₃-S)(Cp*)]₄

Formula Unicode styled: 
[Ta(μ₃-S)(Cp*)]₄
Compound name(s): 
tetrakis-[(μ₃-sulfido)-(η⁵-pentamethylcyclopentadienyl)-tantalum]
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Ta«V3C6OIIIE14B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Cr₂(N₂)(Dmpe)₂(Cp*)₂]²⊕

Formula Unicode styled: 
[Cr₂(N₂)(Dmpe)₂(Cp*)₂]²⊕
Compound name(s): 
(μ₂-dinitrogen)-bis-[(η⁵-(1,2-bis-(dimethylphosphino)ethane)-pentamethylcyclopentadienyl)-chromium](2+)
Central atom: 
Charge on central atom: 
2
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Cr«V2C6OIIE16B6Z0X1L5»2⊕
[MLXZ]𝘲 class: 
[MX1L5]2+
MLXZ class (ENC, equivalent neutral class): 
MX2L4

[Cr(Cl)(Dmpe)(Cp*)]

Formula Unicode styled: 
[Cr(Cl)(Dmpe)(Cp*)]
Compound name(s): 
chloro-(1,2-bis-(dimethylphosphino)ethane)-(η⁵-pentamethylcyclopentadienyl)-chromium
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Cr«V2C6OIIE16B6Z0X2L4»
[MLXZ]𝘲 class: 
[MX2L4]
MLXZ class (ENC, equivalent neutral class): 
MX2L4

[Cr(N)(Dmpe)(Cp*)]⊕

Formula Unicode styled: 
[Cr(N)(Dmpe)(Cp*)]⊕
Compound name(s): 
nitrido-(1,2-bis-(dimethylphosphino)ethane)-(η⁵-pentamethylcyclopentadienyl)-chromium(1+)
Central atom: 
Charge on central atom: 
1
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Cr«V5C6OVE17B8Z0X4L4»
[MLXZ]𝘲 class: 
[MX4L4]+
MLXZ class (ENC, equivalent neutral class): 
MX5L3

[Cr₂(N₂)(Dmpe)₂(Cp*)₂]

Formula Unicode styled: 
[Cr₂(N₂)(Dmpe)₂(Cp*)₂]
Compound name(s): 
(μ₂-dinitrogen)-bis-[(η⁵-(1,2-bis-(dimethylphosphino)ethane)-pentamethylcyclopentadienyl)-chromium]
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Cr«V1C6OIE17B6Z0X1L5»
[MLXZ]𝘲 class: 
[MX1L5]
MLXZ class (ENC, equivalent neutral class): 
MX1L5

[Cr(N)(Dmpe)(Cp*)]

Formula Unicode styled: 
[Cr(N)(Dmpe)(Cp*)]
Compound name(s): 
nitrido-(1,2-bis-(dimethylphosphino)ethane)-(η⁵-pentamethylcyclopentadienyl)-chromium
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Cr«V4C6OIVE18B8Z0X4L4»
[MLXZ]𝘲 class: 
[MX4L4]
MLXZ class (ENC, equivalent neutral class): 
MX4L4

[Al(Cl)(Cp*)(μ₂-Cl)]₂

Formula Unicode styled: 
[Al(Cl)(Cp*)(μ₂-Cl)]₂
Compound name(s): 
bis-[chloro-(μ₂-chloro)-(pentamethylcyclopentadienyl)-aluminium)
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Al«V3C6OIIIE12B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Al(Cp*)(μ₃-Te)]₄

Formula Unicode styled: 
[Al(Cp*)(μ₃-Te)]₄
Compound name(s): 
tetrakis-[(μ₃-tellurido)-(pentamethyl-cyclopentadienyl)-aluminium]
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Al«V3C6OIIIE12B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Al(Cp*)(μ₃-S)]₄

Formula Unicode styled: 
[Al(Cp*)(μ₃-S)]₄
Compound name(s): 
tetrakis-[(μ₃-selenido)-(pentamethyl-cyclopentadienyl)-aluminium]
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Al«V3C6OIIIE12B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Mo(CO)₂{P(SiMe₃)₂}(Cp)]

Formula Unicode styled: 
[Mo(CO)₂{P(SiMe₃)₂}(Cp)]
Compound name(s): 
(η⁵-cyclopentadienyl)-dicarbonyl-(bis(trimethylsilyl)methylidene-phosphine-P)-molybdenum
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Mo«V2C7OIIE18B7Z0X2L5»
[MLXZ]𝘲 class: 
[MX2L5]
MLXZ class (ENC, equivalent neutral class): 
MX2L5

[Tc(CO)₂(PPh₃)(Cp)]

Formula Unicode styled: 
[Tc(CO)₂(PPh₃)(Cp)]
Compound name(s): 
dicarbonyl-(cyclopentadienyl)-(triphenylphosphine)-technetium
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Tc«V1C6OIE18B6Z0X1L5»
[MLXZ]𝘲 class: 
[MX1L5]
MLXZ class (ENC, equivalent neutral class): 
MX1L5

[Fe(OC{O}H-κO)(CO)₂(Cp)]

Formula Unicode styled: 
[Fe(OC{O}H-κO)(CO)₂(Cp)]
Compound name(s): 
Dicarbonyl-(η⁵-cyclopentadienyl)-formato-iron
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Fe(CO)₂(TeMe₂)(Cp)]⊕

Formula Unicode styled: 
[Fe(CO)₂(TeMe₂)(Cp)]⊕
Compound name(s): 
Dicarbonyl-(η⁵-cyclopentadienyl)-dimethyltellurido-iron(1+)
Central atom: 
Attached groups: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Te«V2C2OIIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Lu(CH₂SiMe₃)₂(Thf){η⁵-C₉H₅(SiMe₃)₂}]

Formula Unicode styled: 
[Lu(CH₂SiMe₃)₂(Thf){η⁵-C₉H₅(SiMe₃)₂}]
Compound name(s): 
(eta$5!-1,3-bis(Trimethylsilyl)indenyl)-bis((trimethylsilyl)methyl)-(tetrahydrofuran)-lutetium
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Lu«V3C6OIIIE12B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Eu(OBuᵗ)(μ₂-OBuᵗ)(Cp*)]₂

Formula Unicode styled: 
[Eu(OBuᵗ)(μ₂-OBuᵗ)(Cp*)]₂
Compound name(s): 
bis-[(μ₂-t-butoxo)-(η⁵-pentamethyl-cyclopentadienyl)-(t-butoxy)-europium]
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Eu«V3C6OIIIE18B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

cis–[Eu(OBuᵗ)(μ₂-OBuᵗ)(Cp*)]₂

Formula Unicode styled: 
cis–[Eu(OBuᵗ)(μ₂-OBuᵗ)(Cp*)]₂
Compound name(s): 
bis((μ₂-t-Butoxo)-(η⁵-pentamethyl-cyclopentadienyl)-(t-butoxy)-europium)
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Eu«V3C6OIIIE18B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Ho(CH₂SiMe₃)₂(Thf){η⁵-C₅(SiMe₃)Me₄}]

Formula Unicode styled: 
[Ho(CH₂SiMe₃)₂(Thf){η⁵-C₅(SiMe₃)Me₄}]
Compound name(s): 
(η⁵-Tetramethyl-trimethylsilyl-cyclopentadienyl)-bis(trimethylsilylmethyl)-tetrahydrofuran-holmium
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Ho«V3C6OIIIE22B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3

[Y(μ₂-OBuⁿ){N(SiMe₃)₂}{η⁵-C₅(SiMe₃)Me₄}]₂

Formula Unicode styled: 
[Y(μ₂-OBuⁿ){N(SiMe₃)₂}{η⁵-C₅(SiMe₃)Me₄}]₂
Compound name(s): 
bis-[(μ₂-n-butanolato)-bis(η⁵-1-trimethylsilyl-2,3,4,5-tetramethylcyclopentadienyl)-bis(bis(dimethylsilyl)amido)-yttrium]
Central atom: 
Charge on central atom: 
0
Compound type: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
Oxidation Number (ON) (Roman numerals): 
Coordination Number (CN, sum of attached group denticities): 
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
Summary of calculated classifications: 
Y«V3C6OIIIE12B6Z0X3L3»
[MLXZ]𝘲 class: 
[MX3L3]
MLXZ class (ENC, equivalent neutral class): 
MX3L3