4-coordinate: tetrahedral (p-block element, 2 lone pairs)

[O(Buᵗ)]₂

Formula Unicode styled: 
[O(Buᵗ)]₂
Compound name(s): 
Di-t-butyl-peroxide
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: 
O«V2C2O-IE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[O(Buᵗ)(SiPh₃)]

Formula Unicode styled: 
[O(Buᵗ)(SiPh₃)]
Compound name(s): 
t-butoxy(triphenyl)silane
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: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[O(Buⁿ)(H)]

Formula Unicode styled: 
[O(Buⁿ)(H)]
Compound name(s): 
Butan-1-ol
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: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[O(BiPh₃)₂]²⊕

Formula Unicode styled: 
[O(BiPh₃)₂]²⊕
Compound name(s): 
mu-Oxo-bis(triphenyl-bismuth(2+)
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: 
O«V2C2O-IIE8B2Z0X0L2»2⊕
[MLXZ]𝘲 class: 
[ML2]2+
MLXZ class (ENC, equivalent neutral class): 
MX2

[O(AsPh₃)(BF₃)]

Formula Unicode styled: 
[O(AsPh₃)(BF₃)]
Compound name(s): 
Triphenylarsine oxide-trifluoroborane
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: 
O«V2C2OOE8B2X0L1Z1»
[MLXZ]𝘲 class: 
[ML1Z1]
MLXZ class (ENC, equivalent neutral class): 
MX2

[O(AsF₅)₂]²⊖

Formula Unicode styled: 
[O(AsF₅)₂]²⊖
Compound name(s): 
bis(pentafluoroarsenate)-oxygen(2-)
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: 
O«V2C2O-IIE8B2L0X0Z2»2⊖
[MLXZ]𝘲 class: 
[MZ2]2-
MLXZ class (ENC, equivalent neutral class): 
MX2

[O(AsCl₅)(PMe₃)]

Formula Unicode styled: 
[O(AsCl₅)(PMe₃)]
Compound name(s): 
(Trimethylphosphine)-(pentachloro-antimony)-oxygen
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: 
O«V2C2OOE8B2X0L1Z1»
[MLXZ]𝘲 class: 
[ML1Z1]
MLXZ class (ENC, equivalent neutral class): 
MX2

[O({CH)₄}]

Formula Unicode styled: 
[O({CH)₄}]
Compound name(s): 
Furan
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: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te(SnBz₂)]₃

Formula Unicode styled: 
[Te(SnBz₂)]₃
Compound name(s): 
2,2,4,4,6,6-Hexabenzylcyclotristannatellurane
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: 
Te«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te(Te)]₂²⊖

Formula Unicode styled: 
[Te(Te)]₂²⊖
Compound name(s): 
bis-[tetratellurium(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: 
Te«V2C2OOE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te(Ph)₂]

Formula Unicode styled: 
[Te(Ph)₂]
Compound name(s): 
Diphenyl-tellurium
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: 
Te«V2C2OIIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te{TeSi(SiMe₃)₃}₂]

Formula Unicode styled: 
[Te{TeSi(SiMe₃)₃}₂]
Compound name(s): 
bis(tris(Trimethylsilyl)methyl)-tri-tellurium
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: 
Te«V2C2OOE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te{SeC(NH₂)₂}₂]²⊕

Formula Unicode styled: 
[Te{SeC(NH₂)₂}₂]²⊕
Compound name(s): 
bis(Selenourea-Se)-tellurium(2+)
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: 
Te«V2C2OIIE8B2Z0X0L2»2⊕
[MLXZ]𝘲 class: 
[ML2]2+
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te{S₂P(OMe)₂-κS}₂]

Formula Unicode styled: 
[Te{S₂P(OMe)₂-κS}₂]
Compound name(s): 
bis(Dimethyldithiophosphato)-tellurium
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: 
Te«V2C2OIIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te{S₂P(OEt)₂-κS}₂]

Formula Unicode styled: 
[Te{S₂P(OEt)₂-κS}₂]
Compound name(s): 
bis(Diethyldithiophosphato)-tellurium
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: 
Te«V2C2OIIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te{C(SCHCHCH)}₂]

Formula Unicode styled: 
[Te{C(SCHCHCH)}₂]
Compound name(s): 
bis(2-Thienyl)-tellurium
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: 
Te«V2C2OIIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te{C(SCHCHCH)}]₂

Formula Unicode styled: 
[Te{C(SCHCHCH)}]₂
Compound name(s): 
bis-[thienyl-tellurium]
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: 
Te«V2C2OIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te(TeBr)]₂

Formula Unicode styled: 
[Te(TeBr)]₂
Compound name(s): 
bis-[bromotellurium-tellurium]
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: 
Te«V2C2OOE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te(Te₂)₂]²⊖

Formula Unicode styled: 
[Te(Te₂)₂]²⊖
Compound name(s): 
pentatellurium(2-)
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: 
Te«V2C2OOE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Te(SbMe₂)₂]

Formula Unicode styled: 
[Te(SbMe₂)₂]
Compound name(s): 
Tetramethyldistibatellurium
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: 
Te«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2