7-coordinate: ③-●-4 piano stool

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

[Re(CO)₂(S₂)(Cp)]

Formula Unicode styled: 
[Re(CO)₂(S₂)(Cp)]
Compound name(s): 
disulfur-dicarbonyl-(η-cyclopentadienyl)-rhenium
Central atom: 
Rhenium
Attached groups: 
CO (carbonyl)
S₂ (disulfanediyl-κ²S)
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: 7
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Re«V3C7OIIIE18B7Z0X3L4»
[MLXZ]𝘲 class: 
[MX3L4]
MLXZ class (ENC, equivalent neutral class): 
MX3L4

[Re(NEt₂H)₂(η³-C₃H₅)(Cp*)]⊕

Formula Unicode styled: 
[Re(NEt₂H)₂(η³-C₃H₅)(Cp*)]⊕
Compound name(s): 
endo-(eta-Pentamethyl-cyclopentadienyl)-(eta-allyl)-bis(ethylamino)-rhenium(1+)
Central atom: 
Rhenium
Attached groups: 
NEt₂H (diethylamine)
C₃H₅ (η³-allyl)
Cp* (η⁵-pentamethylcyclopentadienyl)
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: 7
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Re«V3C7OIIIE18B7Z0X2L5»⊕
[MLXZ]𝘲 class: 
[MX2L5]+
MLXZ class (ENC, equivalent neutral class): 
MX3L4

[Re(H)(CO)(η³-C₃H₅)(Cp*)]

Formula Unicode styled: 
[Re(H)(CO)(η³-C₃H₅)(Cp*)]
Compound name(s): 
hydrido-carbonyl-(η-allyl)-(η-pentamethyl-cyclopentadienyl)-rhenium
Central atom: 
Rhenium
Attached groups: 
H (hydrido)
CO (carbonyl)
C₃H₅ (η³-allyl)
Cp* (η⁵-pentamethylcyclopentadienyl)
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: 7
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Re«V3C7OIIIE18B7Z0X3L4»
[MLXZ]𝘲 class: 
[MX3L4]
MLXZ class (ENC, equivalent neutral class): 
MX3L4

[Li(Cp)(12-crown-4-κ⁴O)]

Formula Unicode styled: 
[Li(Cp)(12-crown-4-κ⁴O)]
Compound name(s): 
(Cyclopentadienyl)-(12-crown-4)-lithium
Central atom: 
Lithium
Attached groups: 
Cp (η⁵-cyclopentadienyl)
12-crown-4 (12-crown-4-κ⁴O)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 7
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 14
Summary of calculated classifications: 
Li«V1C7OIE14B7Z0X1L6»
[MLXZ]𝘲 class: 
[MX1L6]
MLXZ class (ENC, equivalent neutral class): 
MX1L6

[Mg(OEt₂)(Cp)₂]

Formula Unicode styled: 
[Mg(OEt₂)(Cp)₂]
Compound name(s): 
bis(eta-Cyclopentadienyl)-(tetrahydrofuran)-magnesium
Central atom: 
Magnesium
Attached groups: 
OEt₂ (diethylether)
Cp (η⁵-cyclopentadienyl)
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: 7
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 14
Summary of calculated classifications: 
Mg«V2C7OIIE14B7Z0X2L5»
[MLXZ]𝘲 class: 
[MX2L5]
MLXZ class (ENC, equivalent neutral class): 
MX2L5