SeO₃ (trioxo-selenium-κSe Z)

[Co(SeO₃-κSe)(NH₃)₅]⊖

Formula Unicode styled: 
[Co(SeO₃-κSe)(NH₃)₅]⊖
Compound name(s): 
Selenato-pentaammine-cobalt(1-)
Central atom: 
Cobalt
Attached groups: 
SeO₃ (trioxo-selenium-κSe Z)
NH₃ (ammine)
Charge on central atom: 
-1
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: 6
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 20
Summary of calculated classifications: 
Co«V1C6O-IE20B6X0L5Z1»⊖
[MLXZ]𝘲 class: 
[ML5Z1]-
MLXZ class (ENC, equivalent neutral class): 
MX1L5

[O(H)(SeO₃-κSe)]⊖

Formula Unicode styled: 
[O(H)(SeO₃-κSe)]⊖
Compound name(s): 
hydrogenselenate(1-)
Central atom: 
Oxygen
Attached groups: 
H (hydrido)
SeO₃ (trioxo-selenium-κSe Z)
Charge on central atom: 
-1
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2L0X1Z1»⊖
[MLXZ]𝘲 class: 
[MX1Z1]-
MLXZ class (ENC, equivalent neutral class): 
MX2

[O(Et)₂(SeO₃-κSe)]

Formula Unicode styled: 
[O(Et)₂(SeO₃-κSe)]
Compound name(s): 
(Diethyl ether)-trioxo-selenium
Central atom: 
Oxygen
Attached groups: 
Et (ethyl)
SeO₃ (trioxo-selenium-κSe Z)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-II)
Coordination Number (CN, sum of attached group denticities): 
CN: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V4C3O-IIE8B3L0X2Z1»
[MLXZ]𝘲 class: 
[MX2Z1]
MLXZ class (ENC, equivalent neutral class): 
MX2Z1

[O(SeO₃-κSe)]²⊖

Formula Unicode styled: 
[O(SeO₃-κSe)]²⊖
Compound name(s): 
tetraoxoselenium(2-), selenate
Central atom: 
Oxygen
Attached groups: 
SeO₃ (trioxo-selenium-κSe Z)
Charge on central atom: 
-2
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: 1
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C1O-IIE8B2L0X0Z1»2⊖
[MLXZ]𝘲 class: 
[MZ1]2-
MLXZ class (ENC, equivalent neutral class): 
MX2