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

trans–[Np(O)₂(NO₂-κ²O)(OH₂)(Terpy-κ³N)]

Formula Unicode styled: 
trans–[Np(O)₂(NO₂-κ²O)(OH₂)(Terpy-κ³N)]
Compound name(s): 
Aqua-dioxo-nitrato-(2,2':6',2''-terpyridyl)-neptunium
Central atom: 
Oxygen
Attached groups: 
NO (nitrito-κO➝M complex)
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

trans–[Np(O)₂(NO₂-κ²O)(N₂C₃H₄)₄]

Formula Unicode styled: 
trans–[Np(O)₂(NO₂-κ²O)(N₂C₃H₄)₄]
Compound name(s): 
Tetrakis(1H-imidazole-kappaN-)-(nitrito-kappaO)-dioxo-neptunium
Central atom: 
Oxygen
Attached groups: 
NO (nitrito-κO➝M complex)
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

cis–[Cu(CO₃-κ²O)(Phen)₂]⊕

Formula Unicode styled: 
cis–[Cu(CO₃-κ²O)(Phen)₂]⊕
Compound name(s): 
(Carbonato-O,O')-bis(1,10-phenanthroline)-copper(1+)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
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

[Co(CO₃-κ²O)(Tn)₂]⊕

Formula Unicode styled: 
[Co(CO₃-κ²O)(Tn)₂]⊕
Compound name(s): 
(Carbonato-O,O')-bis(1,3-diaminopropane-N,N')-cobalt(1+)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Co 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

[Co(CO₃-κ²O)(Phen)₂]⊕

Formula Unicode styled: 
[Co(CO₃-κ²O)(Phen)₂]⊕
Compound name(s): 
bis(Phenanthroline)-carbonato-cobalt(1+)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Co 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

[Co(CO₃-κ²O)(En)₂]⊕

Formula Unicode styled: 
[Co(CO₃-κ²O)(En)₂]⊕
Compound name(s): 
Carbonato-bis(ethylenediamine)-cobalt(1+)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Co 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

[Co(CO₃-κ²O)(Bpy)₂]⊕

Formula Unicode styled: 
[Co(CO₃-κ²O)(Bpy)₂]⊕
Compound name(s): 
(Carbonato-O,O')-bis(2,2'-bipyridine)-cobalt(1+)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Co 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–[Co(CO₃-κ²O)(Py)₄]⊕

Formula Unicode styled: 
cis–[Co(CO₃-κ²O)(Py)₄]⊕
Compound name(s): 
Carbonato-tetrakis(pyridine)-cobalt(1+)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Co 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–[Co(CO₃-κ²O)(NH₃)₄]⊕

Formula Unicode styled: 
cis–[Co(CO₃-κ²O)(NH₃)₄]⊕
Compound name(s): 
Tetra-ammine-(carbonato-O,O')-cobalt(1+)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Co 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–[Co(CO₃-κ²O)([12]aneN₄-κ⁴N)]⊕

Formula Unicode styled: 
cis–[Co(CO₃-κ²O)([12]aneN₄-κ⁴N)]⊕
Compound name(s): 
Carbonato-(1,4,7,10-tetra-azacyclododecane)-cobalt(1+)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Co 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–[Cr(CO₃-κ²O)(En)₂]⊕

Formula Unicode styled: 
cis–[Cr(CO₃-κ²O)(En)₂]⊕
Compound name(s): 
Carbonato-bis(ethylenediamine)-chromium(1+)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Cr 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

[Cr(CO₃-κ²O)(En)₂]⊕

Formula Unicode styled: 
[Cr(CO₃-κ²O)(En)₂]⊕
Compound name(s): 
Carbonato-bis(ethylenediamine)-chromium(1+)
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Cr 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–[Pd(CO₃-κ²O)(TMEDA-κ²N)]

Formula Unicode styled: 
cis–[Pd(CO₃-κ²O)(TMEDA-κ²N)]
Compound name(s): 
(Carbonato-O,O')-(N,N,N',N'-tetramethylethylenediamine-N,N')-palladium
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Pd 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–[Rh(Ph)(CO₃-κ²O)(PMe₃)₃]

Formula Unicode styled: 
mer,cis–[Rh(Ph)(CO₃-κ²O)(PMe₃)₃]
Compound name(s): 
(Carbonato-O,O')-phenyl-tris(trimethylphosphine)-rhodium
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Rh 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

[Ru(CO₃-κ²O)(Bpy)₂]

Formula Unicode styled: 
[Ru(CO₃-κ²O)(Bpy)₂]
Compound name(s): 
(Carbonato-O,O')-bis(2,2'-bipyridyl)-ruthenium
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Ru 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,trans–[Co(CO₃-κ²O)(N₂C₃H₄)₂(OH₂)₂]

Formula Unicode styled: 
cis,cis,trans–[Co(CO₃-κ²O)(N₂C₃H₄)₂(OH₂)₂]
Compound name(s): 
Carbonato-diaqua-bis(imidazole)-cobalt
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Co 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

[Ni(CO₃-κ²O)(Phen)₂]

Formula Unicode styled: 
[Ni(CO₃-κ²O)(Phen)₂]
Compound name(s): 
(Carbonato)-bis(1,10-phenanthroline)-nickel
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Ni 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–[Pt(CO₃-κ²O)(PPrⁱ₃)₂]

Formula Unicode styled: 
cis–[Pt(CO₃-κ²O)(PPrⁱ₃)₂]
Compound name(s): 
Carbonato-bis(tri-isopropylphosphine)-platinum
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Pt 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–[Pt(CO₃-κ²O)(PPh₃)₂]

Formula Unicode styled: 
cis–[Pt(CO₃-κ²O)(PPh₃)₂]
Compound name(s): 
Carbonato-bis(triphenylphosphine)-platinum
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Pt 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–[Pt(CO₃-κ²O)(PMe₃)₂]

Formula Unicode styled: 
cis–[Pt(CO₃-κ²O)(PMe₃)₂]
Compound name(s): 
Carbonato-bis(trimethylphosphine)-platinum
Central atom: 
Oxygen
Attached groups: 
CO₂R (alkoxycarbonyl)
Pt 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