4-coordinate: tetrahedron (T-4)

[K₂(S)]

Formula Unicode styled: 
[K₂(S)]
Compound name(s): 
sulphido dipotassium|sulfido dipotassium|dipotassium sulfide|dipotassium sulphide
Central atom: 
Potassium
Attached groups: 
S (thio)
Charge on central atom: 
Compound type: 
Lattice
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 0
Summary of calculated classifications: 
K«V1C4OI»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class): 

[K₂(O)]

Formula Unicode styled: 
[K₂(O)]
Compound name(s): 
oxo-dipotassium|dipotassium oxide
Central atom: 
Potassium
Attached groups: 
O (oxo X₂)
Charge on central atom: 
Compound type: 
Lattice
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 0
Summary of calculated classifications: 
K«V1C4OI»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class): 

[K(Thf)₄]⊕

Formula Unicode styled: 
[K(Thf)₄]⊕
Compound name(s): 
tetrakis(tetrahydrofuran)-potassium(1+)
Central atom: 
Potassium
Attached groups: 
Thf (tetrahydrofuran)
Charge on central atom: 
1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
K«V1C4OIE8B4Z0X0L4»⊕
[MLXZ]𝘲 class: 
[ML4]+
MLXZ class (ENC, equivalent neutral class): 
MX1L3

[K(OEt₂)₄]⊕

Formula Unicode styled: 
[K(OEt₂)₄]⊕
Compound name(s): 
tetrakis(Diethyl ether)-potassium(1+)
Central atom: 
Potassium
Attached groups: 
OEt₂ (diethylether)
Charge on central atom: 
1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
K«V1C4OIE8B4Z0X0L4»⊕
[MLXZ]𝘲 class: 
[ML4]+
MLXZ class (ENC, equivalent neutral class): 
MX1L3

[Ca{N(SiMe₃)₂}₂(Thf)₂]

Formula Unicode styled: 
[Ca{N(SiMe₃)₂}₂(Thf)₂]
Compound name(s): 
bis(Tetrahydrofuran-O)-bis(bis(trimethylsilyl)amino)-calcium
Central atom: 
Calcium
Attached groups: 
N(SiMe₃)₂ (bis(trimethylsilyl)amino)
Thf (tetrahydrofuran)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Ca«V2C4OIIE8B4Z0X2L2»
[MLXZ]𝘲 class: 
[MX2L2]
MLXZ class (ENC, equivalent neutral class): 
MX2L2

[Ca{N(SiMe₃)₂}₂(OPPh₃)₂]

Formula Unicode styled: 
[Ca{N(SiMe₃)₂}₂(OPPh₃)₂]
Compound name(s): 
bis(bis(Trimethylsilyl)amido)-bis(triphenylphosphine oxide)-calcium
Central atom: 
Calcium
Attached groups: 
N(SiMe₃)₂ (bis(trimethylsilyl)amino)
OPPh₃ (triphenylphosphane oxide)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Ca«V2C4OIIE8B4Z0X2L2»
[MLXZ]𝘲 class: 
[MX2L2]
MLXZ class (ENC, equivalent neutral class): 
MX2L2

[Ca{CH(SiMe₃)₂}₂(Thf)₂]

Formula Unicode styled: 
[Ca{CH(SiMe₃)₂}₂(Thf)₂]
Compound name(s): 
bis(bis(Trimethylsilyl)methyl)-bis(tetrahydrofuran)-calcium
Central atom: 
Calcium
Attached groups: 
CH(SiMe₃)₂ (bistrimethylsilylmethyl)
Thf (tetrahydrofuran)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Ca«V2C4OIIE8B4Z0X2L2»
[MLXZ]𝘲 class: 
[MX2L2]
MLXZ class (ENC, equivalent neutral class): 
MX2L2

[Ca{CH(SiMe₃)₂}₂(Diox-κO)₂]

Formula Unicode styled: 
[Ca{CH(SiMe₃)₂}₂(Diox-κO)₂]
Compound name(s): 
bis(1,4-Dioxane-O)-bis(bis(trimethylsilyl)methyl)-calcium
Central atom: 
Calcium
Attached groups: 
CH(SiMe₃)₂ (bistrimethylsilylmethyl)
Diox (dioxane-κO)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Ca«V2C4OIIE8B4Z0X2L2»
[MLXZ]𝘲 class: 
[MX2L2]
MLXZ class (ENC, equivalent neutral class): 
MX2L2

[Ca{C(SiHMe₂)₃}₂(Thf)₂]

Formula Unicode styled: 
[Ca{C(SiHMe₂)₃}₂(Thf)₂]
Compound name(s): 
bis(tetrahydrofuran)-bis(tris(dimethylsilyl)methyl)-calcium
Central atom: 
Calcium
Attached groups: 
C(SiHMe₂)₃ (tris{dimethylsilyl}methyl)
Thf (tetrahydrofuran)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Ca«V2C4OIIE8B4Z0X2L2»
[MLXZ]𝘲 class: 
[MX2L2]
MLXZ class (ENC, equivalent neutral class): 
MX2L2

[Rb₂(Se)]

Formula Unicode styled: 
[Rb₂(Se)]
Compound name(s): 
selenido-dirubidium|dirubidium selenide
Central atom: 
Rubidium
Attached groups: 
Se (selenido)
Charge on central atom: 
Compound type: 
Lattice
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 0
Summary of calculated classifications: 
Rb«V1C4OI»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class): 

[Rb₂(S₂)]

Formula Unicode styled: 
[Rb₂(S₂)]
Compound name(s): 
persulphido-dirubidium|dirubidium persulphide|persulfido-dirubidium|dirubidium persulfide
Central atom: 
Rubidium
Attached groups: 
S₂ (disulfanediyl-κ²S)
Charge on central atom: 
Compound type: 
Lattice
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 0
Summary of calculated classifications: 
Rb«V1C4OI»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class): 

[Rb₂(S)]

Formula Unicode styled: 
[Rb₂(S)]
Compound name(s): 
sulphido-dirubidium|dirubidium sulphide|sulfido-dirubidium|dirubidium sulfide
Central atom: 
Rubidium
Attached groups: 
S (thio)
Charge on central atom: 
Compound type: 
Lattice
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 0
Summary of calculated classifications: 
Rb«V1C4OI»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class): 

[Rb₂(O₂)]

Formula Unicode styled: 
[Rb₂(O₂)]
Compound name(s): 
peroxo-dirubidium|dirubidium peroxide
Central atom: 
Rubidium
Attached groups: 
O₂ (peroxo)
Charge on central atom: 
Compound type: 
Lattice
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 0
Summary of calculated classifications: 
Rb«V1C4OI»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class): 

[Rb₂(O)]

Formula Unicode styled: 
[Rb₂(O)]
Compound name(s): 
Oxo-dirubidium|dirubidium oxide
Central atom: 
Rubidium
Attached groups: 
O (oxo X₂)
Charge on central atom: 
Compound type: 
Lattice
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 0
Summary of calculated classifications: 
Rb«V1C4OI»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class): 

[Na₂(C≡C)]

Formula Unicode styled: 
[Na₂(C≡C)]
Compound name(s): 
acetylido-disodium
disodium acetylide
Central atom: 
Sodium
Attached groups: 
C≡C (acetylido)
Charge on central atom: 
Compound type: 
Lattice
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 0
Summary of calculated classifications: 
Na«V1C4OI»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class): 

[Na(SiBuᵗ₃)(Pmdta-κ³N)]

Formula Unicode styled: 
[Na(SiBuᵗ₃)(Pmdta-κ³N)]
Compound name(s): 
(Tri-t-butylsilyl)-pentamethyldiethylenetriamine-sodium
Central atom: 
Sodium
Attached groups: 
SiBuᵗ₃ (tri-t-butylsilyl)
Pmdta (pentamethyldiethylenetriamine-κ³N)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Na«V1C4OIE8B4Z0X1L3»
[MLXZ]𝘲 class: 
[MX1L3]
MLXZ class (ENC, equivalent neutral class): 
MX1L3

[Na(OPPh₃)₃(Thf)]⊕

Formula Unicode styled: 
[Na(OPPh₃)₃(Thf)]⊕
Compound name(s): 
Tetrahydrofuran-tris(triphenylphosphine oxide)-sodium(1+)
Central atom: 
Sodium
Attached groups: 
OPPh₃ (triphenylphosphane oxide)
Thf (tetrahydrofuran)
Charge on central atom: 
1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Na«V1C4OIE8B4Z0X0L4»⊕
[MLXZ]𝘲 class: 
[ML4]+
MLXZ class (ENC, equivalent neutral class): 
MX1L3

[Na(OEt₂)₄]⊕

Formula Unicode styled: 
[Na(OEt₂)₄]⊕
Compound name(s): 
tetrakis(Diethyl ether-O)-sodium(1+)
Central atom: 
Sodium
Attached groups: 
OEt₂ (diethylether)
Charge on central atom: 
1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Na«V1C4OIE8B4Z0X0L4»⊕
[MLXZ]𝘲 class: 
[ML4]+
MLXZ class (ENC, equivalent neutral class): 
MX1L3

[Na(I)(NHPPh₃)₃]

Formula Unicode styled: 
[Na(I)(NHPPh₃)₃]
Compound name(s): 
Iodo-tris(triphenylphosphineimine)-sodium
Central atom: 
Sodium
Attached groups: 
I (iodo)
NHPPh₃ (triphenylphosphane-hydrido-nitride)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Na«V1C4OIE8B4Z0X1L3»
[MLXZ]𝘲 class: 
[MX1L3]
MLXZ class (ENC, equivalent neutral class): 
MX1L3

[Mg₃(N)₂]

Formula Unicode styled: 
[Mg₃(N)₂]
Compound name(s): 
dinitrido trimagnesium|trimagnesium dinitride
Central atom: 
Magnesium
Attached groups: 
N (nitrido; ≡N)
Charge on central atom: 
Compound type: 
Lattice
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 2
Oxidation Number (ON) (Roman numerals): 
ON: (II)
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 0
Summary of calculated classifications: 
Mg«V2C4OII»
[MLXZ]𝘲 class: 
MLXZ class (ENC, equivalent neutral class):