O (oxo O⊖ X)

[Se(Et)(Ph)(O)₂]

Formula Unicode styled: 
[Se(Et)(Ph)(O)₂]
Compound name(s): 
Ethyl-phenyl-dioxo-selenium
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: 
Se«V6C4OVIE8B4Z0L0X4»2⊕
[MLXZ]𝘲 class: 
[MX4]2+
MLXZ class (ENC, equivalent neutral class): 
MX2Z2

[Se(Cl)₃(O)]⊖

Formula Unicode styled: 
[Se(Cl)₃(O)]⊖
Compound name(s): 
oxo-trichloro-selenium(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: 
Se«V4C4OIVE10B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[Se(Cl)₂(O)(Py)₂]

Formula Unicode styled: 
[Se(Cl)₂(O)(Py)₂]
Compound name(s): 
Oxy-dichloride-dipyridine-selenium
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: 
Se«V4C5OIVE12B5Z0X3L2»
[MLXZ]𝘲 class: 
[MX3L2]+
MLXZ class (ENC, equivalent neutral class): 
MX4L1

[Se(Br)₂(μ₂-Br)(O)]₂²⊖

Formula Unicode styled: 
[Se(Br)₂(μ₂-Br)(O)]₂²⊖
Compound name(s): 
bis(tribromo-oxo-selenium(1-))
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: 
Se«V4C5OIVE12B5Z0X4L1»
[MLXZ]𝘲 class: 
[MX4L1]
MLXZ class (ENC, equivalent neutral class): 
MX4L1

[Se(O₂CPh-κO)₂(O)₂]

Formula Unicode styled: 
[Se(O₂CPh-κO)₂(O)₂]
Compound name(s): 
bis(benzoato)-dioxo-selenium
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: 
Se«V6C4OVIE8B4Z0L0X4»2⊕
[MLXZ]𝘲 class: 
[MX4]2+
MLXZ class (ENC, equivalent neutral class): 
MX2Z2

[Se(O₂CMe-κO)₂(O)₂]

Formula Unicode styled: 
[Se(O₂CMe-κO)₂(O)₂]
Compound name(s): 
bis(acetato)-dioxo-selenium
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: 
Se«V6C4OVIE8B4Z0L0X4»2⊕
[MLXZ]𝘲 class: 
[MX4]2+
MLXZ class (ENC, equivalent neutral class): 
MX2Z2

[Se(O₂CMe-κO)₂(O)]

Formula Unicode styled: 
[Se(O₂CMe-κO)₂(O)]
Compound name(s): 
bis(acetato)-oxo-selenium
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: 
Se«V4C3OIVE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]+
MLXZ class (ENC, equivalent neutral class): 
MX2Z1

[Se(SO₃CF₃-κO)₂(O)]

Formula Unicode styled: 
[Se(SO₃CF₃-κO)₂(O)]
Compound name(s): 
Seleninyl bis(trifluoromethanesulfonate)
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: 
Se«V4C3OIVE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]+
MLXZ class (ENC, equivalent neutral class): 
MX2Z1

[Se(OMe)(O)₂]⊖

Formula Unicode styled: 
[Se(OMe)(O)₂]⊖
Compound name(s): 
methoxy-dioxo-selenium(1-), methyl selenite
Central atom: 
Attached groups: 
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: 
Se«V4C3OIVE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]+
MLXZ class (ENC, equivalent neutral class): 
MX2Z1

[Se(OH)(Ph)(O)]

Formula Unicode styled: 
[Se(OH)(Ph)(O)]
Compound name(s): 
Hydroxo-phenyl-oxo-selenium, Benzeneseleninic acid
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: 
Se«V4C3OIVE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]+
MLXZ class (ENC, equivalent neutral class): 
MX2Z1

[Se(OH)₂(Ph)(O)]⊕

Formula Unicode styled: 
[Se(OH)₂(Ph)(O)]⊕
Compound name(s): 
Dihydroxyphenylselenium(1+)
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: 
Se«V6C4OVIE8B4Z0L0X4»2⊕
[MLXZ]𝘲 class: 
[MX4]2+
MLXZ class (ENC, equivalent neutral class): 
MX2Z2

[Se(OH)₂(O)₂]

Formula Unicode styled: 
[Se(OH)₂(O)₂]
Compound name(s): 
Dihydroxy-dioxo-selenium, selenic acid
Central atom: 
Attached groups: 
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: 
Se«V6C4OVIE8B4Z0L0X4»2⊕
[MLXZ]𝘲 class: 
[MX4]2+
MLXZ class (ENC, equivalent neutral class): 
MX2Z2

[Se(OH)(O)₃]⊖

Formula Unicode styled: 
[Se(OH)(O)₃]⊖
Compound name(s): 
hydroxo-trioxo-selenium(1-), hydrogenselenate
Central atom: 
Attached groups: 
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: 
Se«V6C4OVIE8B4Z0L0X4»2⊕
[MLXZ]𝘲 class: 
[MX4]2+
MLXZ class (ENC, equivalent neutral class): 
MX2Z2

[Se(OH)(O)₂]⊖

Formula Unicode styled: 
[Se(OH)(O)₂]⊖
Compound name(s): 
hydroxo-dioxo0selenium(1-), hydrogenselenite
Central atom: 
Attached groups: 
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: 
Se«V4C3OIVE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]+
MLXZ class (ENC, equivalent neutral class): 
MX2Z1

[Se(O)₂(μ₂–O)]₄

Formula Unicode styled: 
[Se(O)₂(μ₂–O)]₄
Compound name(s): 
Tetra-[trioxo-selenium], selenium trioxide
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: 
Se«V6C4OVIE8B4Z0L0X4»2⊕
[MLXZ]𝘲 class: 
[MX4]2+
MLXZ class (ENC, equivalent neutral class): 
MX2Z2

[Se(O)₃]²⊖

Formula Unicode styled: 
[Se(O)₃]²⊖
Compound name(s): 
Trioxo-selenium(2-)
Central atom: 
Attached groups: 
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: 
Se«V4C3OIVE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]+
MLXZ class (ENC, equivalent neutral class): 
MX2Z1

[Se(O)₃(OEt₂)]

Formula Unicode styled: 
[Se(O)₃(OEt₂)]
Compound name(s): 
(Diethyl ether)-trioxo-selenium
Central atom: 
Charge on central atom: 
3
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: 
Se«V6C4OVIE8B4Z0X3L1»3⊕
[MLXZ]𝘲 class: 
[MX3L1]3+
MLXZ class (ENC, equivalent neutral class): 
MX2Z2

[Se(NMe₂)₂(O)₂]

Formula Unicode styled: 
[Se(NMe₂)₂(O)₂]
Compound name(s): 
Di-(N,N,N',N'-Tetramethylamide)-dioxo-selenium
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: 
Se«V6C4OVIE8B4Z0L0X4»2⊕
[MLXZ]𝘲 class: 
[MX4]2+
MLXZ class (ENC, equivalent neutral class): 
MX2Z2

[Se(NH₂)(Ph)(O)₂]

Formula Unicode styled: 
[Se(NH₂)(Ph)(O)₂]
Compound name(s): 
Benzeneselenonylamide
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: 
Se«V6C4OVIE8B4Z0L0X4»2⊕
[MLXZ]𝘲 class: 
[MX4]2+
MLXZ class (ENC, equivalent neutral class): 
MX2Z2

[Se(Mes)₂(O)]

Formula Unicode styled: 
[Se(Mes)₂(O)]
Compound name(s): 
bis(2,4,6-trimethylphenyl)-oxo-selenium
Central atom: 
Attached groups: 
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: 
Se«V4C3OIVE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]+
MLXZ class (ENC, equivalent neutral class): 
MX2Z1