3-coordinate: trigonal planar (p-block element, 1 lone pair)

[Er(CO₃-κ²O)₄]⁵⊖

Formula Unicode styled: 
[Er(CO₃-κ²O)₄]⁵⊖
Compound name(s): 
tetrakis(carbonato)-erbium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Er group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Gd(OH₂)(CO₃-κ²O)₄]⁵⊖

Formula Unicode styled: 
[Gd(OH₂)(CO₃-κ²O)₄]⁵⊖
Compound name(s): 
aqua-tetracarbonato-gadolinium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Gd group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Eu(CO₃-κ²O)₄(OH₂)]⁵⊖

Formula Unicode styled: 
[Eu(CO₃-κ²O)₄(OH₂)]⁵⊖
Compound name(s): 
aqua-tetracarbonato-europium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Eu group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Sm(CO₃-κ²O)₄(OH₂)]⁵⊖

Formula Unicode styled: 
[Sm(CO₃-κ²O)₄(OH₂)]⁵⊖
Compound name(s): 
aqua(tetrakis(carbonato))-samarium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Sm group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Nd(CO₃-κ²O)₄(OH₂)]⁵⊖

Formula Unicode styled: 
[Nd(CO₃-κ²O)₄(OH₂)]⁵⊖
Compound name(s): 
aqua-tetrakis(carbonato)-neodymium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Nd group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Yb(CO₃-κ²O)₄]⁵⊖

Formula Unicode styled: 
[Yb(CO₃-κ²O)₄]⁵⊖
Compound name(s): 
tetracarbonato-ytterbium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Yb group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Pr(OH₂)(CO₃-κ²O)₄]⁵⊖

Formula Unicode styled: 
[Pr(OH₂)(CO₃-κ²O)₄]⁵⊖
Compound name(s): 
aqua-tetrakis(carbonato)-praseodymium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Pr group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Y(CO₃-κ²O)₄]⁵⊖

Formula Unicode styled: 
[Y(CO₃-κ²O)₄]⁵⊖
Compound name(s): 
tetracarbonato-yttrium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Y group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Tm(CO₃-κ²O)₄]⁵⊖

Formula Unicode styled: 
[Tm(CO₃-κ²O)₄]⁵⊖
Compound name(s): 
pentaguanidinium tetracarbonato-thulium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Tm group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Lu(CO₃-κ²O)₄]⁵⊖

Formula Unicode styled: 
[Lu(CO₃-κ²O)₄]⁵⊖
Compound name(s): 
tetracarbonato-lutetium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Lu group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Th(F)₃(CO₃-κ²O)₃]⁵⊖

Formula Unicode styled: 
[Th(F)₃(CO₃-κ²O)₃]⁵⊖
Compound name(s): 
tris(carbonato-O,O')-trifluoro-thorium(5-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Th group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Ce(CO₃-κ²O)₅]⁶⊖

Formula Unicode styled: 
[Ce(CO₃-κ²O)₅]⁶⊖
Compound name(s): 
pentacarbonato-cerium(6-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Ce group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Ce(CO₃-κ²O)₅]⁶⊖

Formula Unicode styled: 
[Ce(CO₃-κ²O)₅]⁶⊖
Compound name(s): 
pentakis(carbonato-O,O')-cerium(6-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Ce group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Th(CO₃-κ²O)₅]⁶⊖

Formula Unicode styled: 
[Th(CO₃-κ²O)₅]⁶⊖
Compound name(s): 
pentacarbonato-thorium(6-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Th group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Pu(CO₃-κ²O)₅]⁶⊖

Formula Unicode styled: 
[Pu(CO₃-κ²O)₅]⁶⊖
Compound name(s): 
pentakis(carbonato-O,O')-plutonium(6-)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Pu group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Np(CO₃-κ²O)₅]⁶⊖

Formula Unicode styled: 
[Np(CO₃-κ²O)₅]⁶⊖
Compound name(s): 
pentakis(carbonato-O,O')-neptunate
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Np group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

mer,cis–[V(N₂C₃H₄)₃(Ox-κ²O)(O)]

Formula Unicode styled: 
mer,cis–[V(N₂C₃H₄)₃(Ox-κ²O)(O)]
Compound name(s): 
oxalato-tris(1H-imidazole)-oxo-vanadium
Central atom: 
Oxygen
Attached groups: 
COR (acyl)
V group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

[Be(Ox-κ²O)₂]²⊖

Formula Unicode styled: 
[Be(Ox-κ²O)₂]²⊖
Compound name(s): 
dioxalatoberyllium(2-)
Central atom: 
Oxygen
Attached groups: 
COR (acyl)
Be group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

cis,cis–[Cu(Ox-κ²O)(OH₂)(Bpy)]

Formula Unicode styled: 
cis,cis–[Cu(Ox-κ²O)(OH₂)(Bpy)]
Compound name(s): 
Aqua-(2,2'-bipyridyl)-(oxalato-O,O')-copper
Central atom: 
Oxygen
Attached groups: 
COR (acyl)
Cu group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2

cis–[Cu(Ox-κ²O)(N₂C₃H₄)₂]

Formula Unicode styled: 
cis–[Cu(Ox-κ²O)(N₂C₃H₄)₂]
Compound name(s): 
bis(Imidazole)-oxalato-copper
Central atom: 
Oxygen
Attached groups: 
COR (acyl)
Cu group (X type)
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
O«V2C2O-IIE8B2Z0L0X2»
[MLXZ]𝘲 class: 
[MX2]
MLXZ class (ENC, equivalent neutral class): 
MX2