4-coordinate: tetrahedral (p-block element, 1 lone pair)

[Te(Me)₂(AlCl₃)]

Formula Unicode styled: 
[Te(Me)₂(AlCl₃)]
Compound name(s): 
Trichloro-(dimethyl telluride)-aluminium
Central atom: 
Tellurium
Attached groups: 
Me (methyl)
AlCl₃ (trichloroaluminium)
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: 
Te«V4C3OIIE8B3L0X2Z1»
[MLXZ]𝘲 class: 
[MX2Z1]
MLXZ class (ENC, equivalent neutral class): 
MX2Z1

[Te(Me)₂{Fe(CO)₂Cp}]⊕

Formula Unicode styled: 
[Te(Me)₂{Fe(CO)₂Cp}]⊕
Compound name(s): 
Dicarbonyl-(η⁵-cyclopentadienyl)-dimethyltellurido-iron(1+)
Central atom: 
Tellurium
Attached groups: 
Me (methyl)
Fe(CO)₂Cp (dicarbonylcyclopentadienyliron)
Charge on central atom: 
1
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: 
Te«V4C3OIIE8B3Z0L0X3»⊕
[MLXZ]𝘲 class: 
[MX3]+
MLXZ class (ENC, equivalent neutral class): 
MX2Z1

[P(H)₂{Na(18-crown-6-κ⁶O)}]

Formula Unicode styled: 
[P(H)₂{Na(18-crown-6-κ⁶O)}]
Compound name(s): 
(18-crown-6)-(phosphanyl)-sodium
Central atom: 
Phosphorus
Attached groups: 
H (hydrido)
Na group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 3
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V3C3OIE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]
MLXZ class (ENC, equivalent neutral class): 
MX3

[P(H)(Mes){Li(THF)(tmeda}]

Formula Unicode styled: 
[P(H)(Mes){Li(THF)(tmeda}]
Compound name(s): 
(Tetramethylethylenediamine-N,N')-tetrahydrofuran-mesitylphosphido-lithium
Central atom: 
Phosphorus
Attached groups: 
H (hydrido)
Mes (mesityl)
Li group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 3
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V3C3OIE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]
MLXZ class (ENC, equivalent neutral class): 
MX3

[Si(SiMes₃)₃]⊖

Formula Unicode styled: 
[Si(SiMes₃)₃]⊖
Compound name(s): 
tris(trimethylsilyl)silanide
Central atom: 
Silicon
Attached groups: 
SiMes₃ (trimesitylsilyl)
Charge on central atom: 
-1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 2
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Si«V2C3O-IE8B3Z0L0X3»⊖
[MLXZ]𝘲 class: 
[MX3]-
MLXZ class (ENC, equivalent neutral class): 
MX2L1

[Yb(Thf-κO){N(CH₂CH₂OH)₃}₂]³⊕

Formula Unicode styled: 
[Yb(Thf-κO){N(CH₂CH₂OH)₃}₂]³⊕
Compound name(s): 
bis(Triethanolamine-O,O',O'',N)-(tetrahydrofuran-O)-ytterbium(3+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Yb group (Z type)
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

[Pr(Thf-κO){N(CH₂CH₂OH)₃}₂]³⊕

Formula Unicode styled: 
[Pr(Thf-κO){N(CH₂CH₂OH)₃}₂]³⊕
Compound name(s): 
bis(Triethanolamine-O,O',O'',N)-(tetrahydrofuran-O)-praseodymium(3+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Pr group (Z type)
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

[Bi(NCMe)₂(Thf-κO)(Tp*-κ³N)]²⊕

Formula Unicode styled: 
[Bi(NCMe)₂(Thf-κO)(Tp*-κ³N)]²⊕
Compound name(s): 
bis(acetonitrile)-(hydrogen tris(3,5-dimethylpyrazolyl)borate)-tetrahydrofuran-bismuth(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Bi group (Z type)
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

trans–[Ca{OP(NMe₂)₃}₄(Thf-κO)₂]²⊕

Formula Unicode styled: 
trans–[Ca{OP(NMe₂)₃}₄(Thf-κO)₂]²⊕
Compound name(s): 
tetrakis(Hexamethylphosphoramide)-bis(tetrahydrofuran)-calcium(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Ca group (Z type)
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

trans–[Ca(OH₂)₂(Thf-κO)₄]²⊕

Formula Unicode styled: 
trans–[Ca(OH₂)₂(Thf-κO)₄]²⊕
Compound name(s): 
Di-aqua-tetrakis(tetrahydrofuran-O)-calcium(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Ca group (Z type)
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

[Sr(Thf-κO)₆]²⊕

Formula Unicode styled: 
[Sr(Thf-κO)₆]²⊕
Compound name(s): 
hexakis(Tetrahydrofuran)-strontium(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Sr group (Z type)
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

[Ca(Thf-κO)₆]²⊕

Formula Unicode styled: 
[Ca(Thf-κO)₆]²⊕
Compound name(s): 
hexakis(tetrahydrofuran)-calcium(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Ca group (Z type)
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

[Ca(NCMe)₄(Thf-κO)₄]²⊕

Formula Unicode styled: 
[Ca(NCMe)₄(Thf-κO)₄]²⊕
Compound name(s): 
tetrakis(Acetonitrile)-tetrakis(tetrahydrofuran)-calcium(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Ca group (Z type)
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

[Ca(NCMe)₄(Thf-κO)₃]²⊕

Formula Unicode styled: 
[Ca(NCMe)₄(Thf-κO)₃]²⊕
Compound name(s): 
tetrakis(Acetonitrile)-tris(tetrahydrofuran)-calcium(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Ca group (Z type)
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

[Dy(Me)(Thf-κO)₆]²⊕

Formula Unicode styled: 
[Dy(Me)(Thf-κO)₆]²⊕
Compound name(s): 
Methyl-hexakis(tetrahydrofuran)-dysprosium(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Dy group (Z type)
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

[Ho(Me)(Thf-κO)₆]²⊕

Formula Unicode styled: 
[Ho(Me)(Thf-κO)₆]²⊕
Compound name(s): 
Methyl-hexakis(tetrahydrofuran)-holmium(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Ho group (Z type)
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

[Sm(Thf-κO)₇]²⊕

Formula Unicode styled: 
[Sm(Thf-κO)₇]²⊕
Compound name(s): 
heptakis(Tetrahydrofuran)-samarium(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Sm group (Z type)
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

[Sm(Me)(Thf-κO)₆]²⊕

Formula Unicode styled: 
[Sm(Me)(Thf-κO)₆]²⊕
Compound name(s): 
Methyl-hexakis(tetrahydrofuran)-samarium(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Sm group (Z type)
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

[Fe(Thf-κO)₆]²⊕

Formula Unicode styled: 
[Fe(Thf-κO)₆]²⊕
Compound name(s): 
hexakis(Tetrahydrofuran-O)-iron(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Fe group (Z type)
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

[Co(Thf-κO)₆]²⊕

Formula Unicode styled: 
[Co(Thf-κO)₆]²⊕
Compound name(s): 
hexakis(Tetrahydrofuran)-cobalt(2+)
Central atom: 
Oxygen
Attached groups: 
(CH₂)₄ (tetramethylene-κ²C)
Co group (Z type)
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