7-coordinate: ③-●-4 piano stool

7-coordinate: ③-●-4 piano stool
7-coordinate: 3-4 piano stool

[Cr(H)(CO)₂(PCy₃)(Cp)]

Formula Unicode styled: 
[Cr(H)(CO)₂(PCy₃)(Cp)]
Compound name(s): 
hydrido-dicarbonyl-(tricyclohexylphosphine)-(η⁵-cyclopentadienyl)-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«V2C7OIIE18B7Z0X2L5»
[MLXZ]𝘲 class: 
[MX2L5]
MLXZ class (ENC, equivalent neutral class): 
MX2L5

[Ta(H)(Cp){Ir(H)(Cp*)}]₂

Formula Unicode styled: 
[Ta(H)(Cp){Ir(H)(Cp*)}]₂
Compound name(s): 
bis-[hydrido-{μ₂-(hydrido-η⁵-pentamethylcyclopentadienyl-iridium)}-(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«V5C7OIVE14B7Z0X5L2»
[MLXZ]𝘲 class: 
[MX5L2]
MLXZ class (ENC, equivalent neutral class): 
MX5L2

[Re₂(CO)₄(Cp)₂(μ₂-Se)]

Formula Unicode styled: 
[Re₂(CO)₄(Cp)₂(μ₂-Se)]
Compound name(s): 
(μ₂-selenido)-bis(η⁵-cyclopentadienyl)-tetracarbonyl-di-rhenium
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: 
Re«V3C7OIIE18B7Z0X3L4»
[MLXZ]𝘲 class: 
[MX3L4]
MLXZ class (ENC, equivalent neutral class): 
MX3L4

cis–[Mo(CO)₂(NCMe)₂(Cp)]⊕

Formula Unicode styled: 
cis–[Mo(CO)₂(NCMe)₂(Cp)]⊕
Compound name(s): 
dicarbonyl-diactonitrile-cyclopentadienyl-molybdenum(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: 
Mo«V2C7OIIE18B7Z0X1L6»
[MLXZ]𝘲 class: 
[MX1L6]+
MLXZ class (ENC, equivalent neutral class): 
MX2L5

[Mo(N₃)(NO)(η³-C₃H₄Me)(Cp)]

Formula Unicode styled: 
[Mo(N₃)(NO)(η³-C₃H₄Me)(Cp)]
Compound name(s): 
azido-nitrosyl-methallyl-(η⁵-cyclopentadienyl)-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«V6C7OIIE18B9X4L4Z1»
[MLXZ]𝘲 class: 
[MX4L4Z1]
MLXZ class (ENC, equivalent neutral class): 
MX6L3

[Mo(NCO)(NO)(η³-C₃H₄Me)(Cp)]

Formula Unicode styled: 
[Mo(NCO)(NO)(η³-C₃H₄Me)(Cp)]
Compound name(s): 
isocyanato-nitrosyl-methallyl-(η⁵-cyclopentadienyl)-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«V6C7OIIE18B9X4L4Z1»
[MLXZ]𝘲 class: 
[MX4L4Z1]
MLXZ class (ENC, equivalent neutral class): 
MX6L3

cis–[Mo(CO)₂(Tht)₂(Cp)]⊕

Formula Unicode styled: 
cis–[Mo(CO)₂(Tht)₂(Cp)]⊕
Compound name(s): 
dicarbonyl-bis(tetrahydrothiophene)-cyclopentadienyl-molybdenum(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: 
Mo«V2C7OIIE18B7Z0X1L6»
[MLXZ]𝘲 class: 
[MX1L6]+
MLXZ class (ENC, equivalent neutral class): 
MX2L5

[W(CO)₃(NCMe)(Cp)]⊕

Formula Unicode styled: 
[W(CO)₃(NCMe)(Cp)]⊕
Compound name(s): 
acetonitrile-tricarbonyl-(η⁵-cyclopentadienyl)-tungsten(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: 
W«V2C7OIIE18B7Z0X1L6»
[MLXZ]𝘲 class: 
[MX1L6]+
MLXZ class (ENC, equivalent neutral class): 
MX2L5

[Mo(=CF₂)(CO)₃(Cp*)]⊕

Formula Unicode styled: 
[Mo(=CF₂)(CO)₃(Cp*)]⊕
Compound name(s): 
Difluorocarbene-tricarbonyl-(η⁵-pentamethylcyclopentadienyl)-molybdenum
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: 
Mo«V4C7OIVE18B8Z0X3L5»
[MLXZ]𝘲 class: 
[MX3L5]+
MLXZ class (ENC, equivalent neutral class): 
MX4L4

[Lu(C≡CPh)₂{η⁵-C₅(SiMe₃)Me₄}]₃

Formula Unicode styled: 
[Lu(C≡CPh)₂{η⁵-C₅(SiMe₃)Me₄}]₃
Compound name(s): 
pentakis(μ-2-phenylethyn-1-yl)-tris(1-trimethylsilyl-2,3,4,5-tetramethylcyclopentadienyl)-tri-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«V3C7OIIIE14B7Z0X3L4»
[MLXZ]𝘲 class: 
[MX3L4]
MLXZ class (ENC, equivalent neutral class): 
MX3L4

[V(H)(CO)₃(Cp)]⊖

Formula Unicode styled: 
[V(H)(CO)₃(Cp)]⊖
Compound name(s): 
tris(carbonyl)-hydrido-(η⁵-cyclopentadienyl)-vanadium(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: 
H«V1C1O-IE2B1Z0L0X1»
[MLXZ]𝘲 class: 
[MX1]
MLXZ class (ENC, equivalent neutral class): 
MX1

[V(H)(CO)₃(Cp)]⊖

Formula Unicode styled: 
[V(H)(CO)₃(Cp)]⊖
Compound name(s): 
tris(carbonyl)-hydrido-(η⁵-cyclopentadienyl)-vanadium(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: 
V«V1C7OIE18B7Z0X2L5»
[MLXZ]𝘲 class: 
[MX2L5]-
MLXZ class (ENC, equivalent neutral class): 
MX1L6

[Eu(C≡CPh)(Thf)₂(Cp)]₂

Formula Unicode styled: 
[Eu(C≡CPh)(Thf)₂(Cp)]₂
Compound name(s): 
bis-[(μ₂-phenylacetylide)-(η⁵-pentamethyl-cyclopentadienyl)-bis(tetrahydrofuran)-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«V2C6OIIE19B6Z0X2L4»
[MLXZ]𝘲 class: 
[MX2L4]
MLXZ class (ENC, equivalent neutral class): 
MX2L4

[Dy(CH₂SiMe₃)(Thf)(μ₂-H){η⁵-C₅(SiMe₃)Me₄}]₂

Formula Unicode styled: 
[Dy(CH₂SiMe₃)(Thf)(μ₂-H){η⁵-C₅(SiMe₃)Me₄}]₂
Compound name(s): 
bis-[(μ₂-hydrido)-(trimethylsilylmethyl)-(tetrahydrofuran)-(η⁵-1,2,3,4-tetramethyl-5-trimethylsilyl-cyclopentadienyl)-dysprosium]
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: 
Dy«V3C7OIIIE23B7Z0X3L4»
[MLXZ]𝘲 class: 
[MX3L4]
MLXZ class (ENC, equivalent neutral class): 
MX3L4

[Ho(μ₂-Me)₂(Cp*)]₃

Formula Unicode styled: 
[Ho(μ₂-Me)₂(Cp*)]₃
Compound name(s): 
tris-[di(μ-methyl)-(pentamethyl-cyclopentadienyl)-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«V3C7OIIIE24B7Z0X3L4»
[MLXZ]𝘲 class: 
[MX3L4]
MLXZ class (ENC, equivalent neutral class): 
MX3L4

[Tm(Cl)₂(Dme)(η⁵-C₅HPrⁱ₄)]

Formula Unicode styled: 
[Tm(Cl)₂(Dme)(η⁵-C₅HPrⁱ₄)]
Compound name(s): 
dichloro-(η⁵-tetraisopropylcyclopentadienyl)-(1,2-dimethoxyethane)-thulium
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: 
Tm«V3C7OIIIE26B7Z0X3L4»
[MLXZ]𝘲 class: 
[MX3L4]
MLXZ class (ENC, equivalent neutral class): 
MX3L4

[Tb(μ₂-Me)₂(Cp*)]₃

Formula Unicode styled: 
[Tb(μ₂-Me)₂(Cp*)]₃
Compound name(s): 
tris-[di(μ-methyl)-(pentamethyl-cyclopentadienyl)-terbium]
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: 
Tb«V3C7OIIIE22B7Z0X3L4»
[MLXZ]𝘲 class: 
[MX3L4]
MLXZ class (ENC, equivalent neutral class): 
MX3L4

cis–[Yb(μ₂-F)(Thf)₂(η⁵-C₅HPh₄)]₂

Formula Unicode styled: 
cis–[Yb(μ₂-F)(Thf)₂(η⁵-C₅HPh₄)]₂
Compound name(s): 
bis-[(mu-fluoro)-(η⁵-tetraphenylcyclopentadienyl)-di(tetrahydrofuran)-ytterbium]
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: 
Yb«V2C7OIIE28B7Z0X2L5»
[MLXZ]𝘲 class: 
[MX2L5]
MLXZ class (ENC, equivalent neutral class): 
MX2L5

cis–[Yb(μ₂-Br)(Thf)₂(η⁵-C₅HPh₄)]₂

Formula Unicode styled: 
cis–[Yb(μ₂-Br)(Thf)₂(η⁵-C₅HPh₄)]₂
Compound name(s): 
bis-[(mu-bromo)-(η⁵-tetraphenylcyclopentadienyl)-di(tetrahydrofuran)-ytterbium]
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: 
Yb«V2C7OIIE28B7Z0X2L5»
[MLXZ]𝘲 class: 
[MX2L5]
MLXZ class (ENC, equivalent neutral class): 
MX2L5

[Sc(Ind)(Oep)]

Formula Unicode styled: 
[Sc(Ind)(Oep)]
Compound name(s): 
(η⁵-indenyl)-(octaethylporphyrin)-scandium
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: 
Sc«V3C7OIIIE14B7Z0X3L4»
[MLXZ]𝘲 class: 
[MX3L4]
MLXZ class (ENC, equivalent neutral class): 
MX3L4