9-coordinate: ⑤-●-④ metallocene

[Dy(η⁸-Cot)(η⁹-C₉H₉)]

Formula Unicode styled: 
[Dy(η⁸-Cot)(η⁹-C₉H₉)]
Compound name(s): 
(cyclooctatetraenyl)-(cyclononatetraenyl)-dysprosium
Central atom: 
Dysprosium
Attached groups: 
Cot (η⁸-cyclooctatetraene)
C₉H₉ (η⁹-cyclononatetraenyl)
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: 9
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 29
Summary of calculated classifications: 
Dy«V3C9OIIIE29B10Z0X3L7»
[MLXZ]𝘲 class: 
[MX3L7]
MLXZ class (ENC, equivalent neutral class): 
MX3L7

[Er(η⁸-Cot)(η⁹-C₉H₉)]

Formula Unicode styled: 
[Er(η⁸-Cot)(η⁹-C₉H₉)]
Compound name(s): 
(cyclooctatetraenyl)-(cyclononatetraenyl)-erbium
Central atom: 
Erbium
Attached groups: 
Cot (η⁸-cyclooctatetraene)
C₉H₉ (η⁹-cyclononatetraenyl)
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: 9
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 31
Summary of calculated classifications: 
Er«V3C9OIIIE31B10Z0X3L7»
[MLXZ]𝘲 class: 
[MX3L7]
MLXZ class (ENC, equivalent neutral class): 
MX3L7

[Sm(η⁸-Cot)(η⁹-C₉H₉)]

Formula Unicode styled: 
[Sm(η⁸-Cot)(η⁹-C₉H₉)]
Compound name(s): 
(cyclooctatetraenyl)-(cyclononatetraenyl)-samarium
Central atom: 
Samarium
Attached groups: 
Cot (η⁸-cyclooctatetraene)
C₉H₉ (η⁹-cyclononatetraenyl)
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: 9
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 25
Summary of calculated classifications: 
Sm«V3C9OIIIE25B10Z0X3L7»
[MLXZ]𝘲 class: 
[MX3L7]
MLXZ class (ENC, equivalent neutral class): 
MX3L7