4-coordinate: tetrahedron (T-4)

[Fe(CNXy)₄]²⊖

Formula Unicode styled: 
[Fe(CNXy)₄]²⊖
Compound name(s): 
tetrakis(xylylisocyanido)-iron(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: 
Fe«V2C4O-IIE18B6Z0X0L4»2⊖
[MLXZ]𝘲 class: 
[ML4]2-
MLXZ class (ENC, equivalent neutral class): 
MX2L4

[Fe(η⁴-C₄H₆)₂]⊖

Formula Unicode styled: 
[Fe(η⁴-C₄H₆)₂]⊖
Compound name(s): 
bis(η⁴-buta-1,3-diene)-iron(1-)
Central atom: 
Attached groups: 
Charge on central atom: 
-1
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: 
Fe«V1C4O-IE17B5Z0X0L4»
[MLXZ]𝘲 class: 
[ML4]-
MLXZ class (ENC, equivalent neutral class): 
MX1L4

network–[Be(μ₄–O)]

Formula Unicode styled: 
network–[Be(μ₄–O)]
Compound name(s): 
beryllium oxide (zincblende type)
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: 
Be«V2C4OIIE8B4Z0X2L2»
[MLXZ]𝘲 class: 
[MX2L2]
MLXZ class (ENC, equivalent neutral class): 
MX2L2

catena–3D-[Mg(μ₂-NH₂)₂]

Formula Unicode styled: 
catena–3D-[Mg(μ₂-NH₂)₂]
Compound name(s): 
magnesium diamide
catena-3D-diamino-magnesium
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: 
Mg«V2C4OIIE8B4Z0X2L2»
[MLXZ]𝘲 class: 
[MX2L2]
MLXZ class (ENC, equivalent neutral class): 
MX2L2

catena–3D-[Be(μ₂-NH₂)₂]

Formula Unicode styled: 
catena–3D-[Be(μ₂-NH₂)₂]
Compound name(s): 
beryllium amide
catena-3D-diamino-beryllium
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: 
Be«V2C4OIIE8B4Z0X2L2»
[MLXZ]𝘲 class: 
[MX2L2]
MLXZ class (ENC, equivalent neutral class): 
MX2L2

[Zn(μ₃-H)(μ₃-OBuᵗ)]₄

Formula Unicode styled: 
[Zn(μ₃-H)(μ₃-OBuᵗ)]₄
Compound name(s): 
tetrakis-[(μ₃-t-butoxo)-μ₃-hydrido-zinc]
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: 
Zn«V2C6OIIE8B4Z0X2L2»
[MLXZ]𝘲 class: 
[MX2L2]
MLXZ class (ENC, equivalent neutral class): 
MX2L2

[Co(η⁴-C₄H₆)(η⁴-Cod)]⊖

Formula Unicode styled: 
[Co(η⁴-C₄H₆)(η⁴-Cod)]⊖
Compound name(s): 
(η⁴-1,3-butadiene)-(η²,η²-cycloocta-1,5-diene)-cobalt(1-)
Central atom: 
Charge on central atom: 
-1
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: 
Co«V1C4O-IE18B5Z0X0L4»
[MLXZ]𝘲 class: 
[ML4]-
MLXZ class (ENC, equivalent neutral class): 
MX1L4

[Co(η⁴-Cod)(Bpy)]⊖

Formula Unicode styled: 
[Co(η⁴-Cod)(Bpy)]⊖
Compound name(s): 
(2,2'-bipyridine)-(η²,η²-cycloocta-1,5-diene)-cobalt(1-)
Central atom: 
Charge on central atom: 
-1
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: 
Co«V1C4O-IE18B5Z0X0L4»
[MLXZ]𝘲 class: 
[ML4]-
MLXZ class (ENC, equivalent neutral class): 
MX1L4

[Co{P(OMe)₃}₄]⊖

Formula Unicode styled: 
[Co{P(OMe)₃}₄]⊖
Compound name(s): 
tetrakis(trimethylphosphite)-cobalt(1-)
Central atom: 
Charge on central atom: 
-1
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: 
Co«V1C4O-IE18B5Z0X0L4»
[MLXZ]𝘲 class: 
[ML4]-
MLXZ class (ENC, equivalent neutral class): 
MX1L4

[Co(η⁴-C₄H₆)₂]⊖

Formula Unicode styled: 
[Co(η⁴-C₄H₆)₂]⊖
Compound name(s): 
bis(η⁴-buta-1,3-diene)-iron(1-)
Central atom: 
Attached groups: 
Charge on central atom: 
-1
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: 
Co«V1C4O-IE18B5Z0X0L4»
[MLXZ]𝘲 class: 
[ML4]-
MLXZ class (ENC, equivalent neutral class): 
MX1L4

[Co(η⁴-Cod)₂]⊖

Formula Unicode styled: 
[Co(η⁴-Cod)₂]⊖
Compound name(s): 
bis(η²,η²-cycloocta-1,5-diene)-cobalt(1-)
Central atom: 
Charge on central atom: 
-1
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: 
Co«V1C4O-IE18B5Z0X0L4»
[MLXZ]𝘲 class: 
[ML4]-
MLXZ class (ENC, equivalent neutral class): 
MX1L4

[Co(CNBuᵗ)₄]⊖

Formula Unicode styled: 
[Co(CNBuᵗ)₄]⊖
Compound name(s): 
tetrakis(t-butylisocyanido)-cobalt(1-)
Central atom: 
Charge on central atom: 
-1
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: 
Co«V1C4O-IE18B5Z0X0L4»
[MLXZ]𝘲 class: 
[ML4]-
MLXZ class (ENC, equivalent neutral class): 
MX1L4

[Co(C₂H₄)₄]⊖

Formula Unicode styled: 
[Co(C₂H₄)₄]⊖
Compound name(s): 
tetrakis(η²-ethylene)-cobalt(1-)
Central atom: 
Attached groups: 
Charge on central atom: 
-1
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: 
Co«V1C4O-IE18B5Z0X0L4»
[MLXZ]𝘲 class: 
[ML4]-
MLXZ class (ENC, equivalent neutral class): 
MX1L4

[V(H){N(SiMe₃)₂}₃]⊖

Formula Unicode styled: 
[V(H){N(SiMe₃)₂}₃]⊖
Compound name(s): 
hydrido-tris{bis(trimethylsilyl)amido}-vanadium(1-)]
Central atom: 
Charge on central atom: 
-1
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: 
V«V3C4OIIIE16B7Z0X4L3»
[MLXZ]𝘲 class: 
[MX4L3]-
MLXZ class (ENC, equivalent neutral class): 
MX3L4

[Mo(SeMes)₃]₂

Formula Unicode styled: 
[Mo(SeMes)₃]₂
Compound name(s): 
bis-[tris(2,4,6-trimethylphenylseleno)-molybdenum(Mo≡Mo)]
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: 
Mo«V6C4OIIIE12B6Z0L0X6»
[MLXZ]𝘲 class: 
[MX6]
MLXZ class (ENC, equivalent neutral class): 
MX6

[W(SeMes)₃]₂

Formula Unicode styled: 
[W(SeMes)₃]₂
Compound name(s): 
bis-[tris(2,4,6-trimethylphenylseleno)-tungsten(W≡W)]
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: 
W«V6C4OIIIE12B6Z0L0X6»
[MLXZ]𝘲 class: 
[MX6]
MLXZ class (ENC, equivalent neutral class): 
MX6

[W(Se)₂(μ₂-Se)]₂²⊖

Formula Unicode styled: 
[W(Se)₂(μ₂-Se)]₂²⊖
Compound name(s): 
bis-[(μ₂-seleno)-{diselenido-tungsten}(1-)]
Central atom: 
Charge on central atom: 
-1
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: 
W«V5C4OVE13B6Z0L0X6»
[MLXZ]𝘲 class: 
[MX6]-
MLXZ class (ENC, equivalent neutral class): 
MX5L1

[Bi(NPrⁱ₂)₂(Thf)₂]⊕

Formula Unicode styled: 
[Bi(NPrⁱ₂)₂(Thf)₂]⊕
Compound name(s): 
bis(di-isopropylamino)-bis(tetrahydrofuran)-bismuth(1+)
Central atom: 
Charge on central atom: 
1
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: 
Bi«V3C4OIIIE10B4Z0X2L2»
[MLXZ]𝘲 class: 
[MX2L2]+
MLXZ class (ENC, equivalent neutral class): 
MX3L1

[Bi(Br)₂{Mo(CO)₃Cp}₂]⊖

Formula Unicode styled: 
[Bi(Br)₂{Mo(CO)₃Cp}₂]⊖
Compound name(s): 
dibromo-bis{tricarbonyl-(η⁵-cyclopentadienyl)-molybdenum}-bismuth(1-)
Central atom: 
Charge on central atom: 
-1
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: 
Bi«V3C4O-IE10B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]-
MLXZ class (ENC, equivalent neutral class): 
MX3L1

[Bi(Cl)₂{W(CO)₃Cp}₂]⊖

Formula Unicode styled: 
[Bi(Cl)₂{W(CO)₃Cp}₂]⊖
Compound name(s): 
dichloro-bis{tricarbonyl-(η⁵-cyclopentadienyl)-tungsten}-bismuth(1-)
Central atom: 
Charge on central atom: 
-1
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: 
Bi«V3C4O-IE10B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]-
MLXZ class (ENC, equivalent neutral class): 
MX3L1