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

[Tl(OC₆H₄CN)]₄

Formula Unicode styled: 
[Tl(OC₆H₄CN)]₄
Compound name(s): 
tetrakis-[μ₃-4-cyanophenoxy-thallium]
Central atom: 
Thallium
Attached groups: 
OC₆H₄CN (μ₃-cyanophenoxy)
Charge on central atom: 
0
Compound type: 
Oligomer
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
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: 
Tl«V1C3OIE8B3Z0X1L2»
[MLXZ]𝘲 class: 
[MX1L2]
MLXZ class (ENC, equivalent neutral class): 
MX1L2

[Tl(μ₂-S₄)]₂²⊖

Formula Unicode styled: 
[Tl(μ₂-S₄)]₂²⊖
Compound name(s): 
bis-[(tetrasulfido)-thallium](2-)
Central atom: 
Thallium
Attached groups: 
S₄ (μ₂-tetrasulfanediyl-κ³S)
Charge on central atom: 
-1
Compound type: 
Oligomer
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
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: 
Tl«V1C3OIE8B3Z0X2L1»⊖
[MLXZ]𝘲 class: 
[MX2L1]-
MLXZ class (ENC, equivalent neutral class): 
MX1L2

[I(C₆H₄Cl)(O)₂]

Formula Unicode styled: 
[I(C₆H₄Cl)(O)₂]
Compound name(s): 
(p-chloro-phenyl)-dioxo-iodine
p-chloroiodoxybenzene
Central atom: 
Iodine
Attached groups: 
C₆H₄Cl (p-chlorophenyl)
O (oxo Z)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 5
Oxidation Number (ON) (Roman numerals): 
ON: (V)
Coordination Number (CN, sum of attached group denticities): 
CN: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
I«V5C3OVE8B3L0X1Z2»
[MLXZ]𝘲 class: 
[MX1Z2]
MLXZ class (ENC, equivalent neutral class): 
MX1Z2

[As(Cp-κC)(Bpy)]²⊕

Formula Unicode styled: 
[As(Cp-κC)(Bpy)]²⊕
Compound name(s): 
(η¹-pentamethylcyclopentadienyl)-(2,2'-bipyridine)-arsenic(2+)
Central atom: 
Arsenic
Attached groups: 
Cp (cyclopentadienyl-κC)
Bpy (bipyridine)
Charge on central atom: 
2
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 3
Oxidation Number (ON) (Roman numerals): 
ON: (III)
Coordination Number (CN, sum of attached group denticities): 
CN: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
As«V3C3OIIIE8B3Z0X1L2»2⊕
[MLXZ]𝘲 class: 
[MX1L2]2+
MLXZ class (ENC, equivalent neutral class): 
MX3

[P(Buᵗ)]₄

Formula Unicode styled: 
[P(Buᵗ)]₄
Compound name(s): 
tetra-t-butylcyclotetraphosphane
Central atom: 
Phosphorus
Attached groups: 
Buᵗ (t-butyl)
Charge on central atom: 
0
Compound type: 
Oligomer
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{N(CH₂)₅}₃]

Formula Unicode styled: 
[P{N(CH₂)₅}₃]
Compound name(s): 
tris(piperidino)-phosphine
Central atom: 
Phosphorus
Attached groups: 
N(CH₂)₅ (piperidinato)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 3
Oxidation Number (ON) (Roman numerals): 
ON: (III)
Coordination Number (CN, sum of attached group denticities): 
CN: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V3C3OIIIE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]
MLXZ class (ENC, equivalent neutral class): 
MX3

[P(Tol-o)₃]

Formula Unicode styled: 
[P(Tol-o)₃]
Compound name(s): 
tri-o-tolylphosphine
Central atom: 
Phosphorus
Attached groups: 
Tol-o (o-tolyl)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 3
Oxidation Number (ON) (Roman numerals): 
ON: (III)
Coordination Number (CN, sum of attached group denticities): 
CN: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V3C3OIIIE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]
MLXZ class (ENC, equivalent neutral class): 
MX3

[P(C₆F₅)]₄

Formula Unicode styled: 
[P(C₆F₅)]₄
Compound name(s): 
cyclo-tetra-[(pentafluorophenyl)phosphorus]
Central atom: 
Phosphorus
Attached groups: 
C₆F₅ (pentafluorophenyl)
Charge on central atom: 
0
Compound type: 
Oligomer
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(Cy)]₄

Formula Unicode styled: 
[P(Cy)]₄
Compound name(s): 
tetra-[cyclohexylcyclotetraphosphine]
Central atom: 
Phosphorus
Attached groups: 
Cy (cyclohexyl)
Charge on central atom: 
0
Compound type: 
Oligomer
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(Ph)]₆

Formula Unicode styled: 
[P(Ph)]₆
Compound name(s): 
hexaphenylcyclohexaphosphine
cyclo-hexa-[phenyl-phosphorus]
Central atom: 
Phosphorus
Attached groups: 
Ph (phenyl)
Charge on central atom: 
0
Compound type: 
Oligomer
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(Ph)]₅

Formula Unicode styled: 
[P(Ph)]₅
Compound name(s): 
penta[phenyl-phosphorus]
Central atom: 
Phosphorus
Attached groups: 
Ph (phenyl)
Charge on central atom: 
0
Compound type: 
Oligomer
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(F)]₄

Formula Unicode styled: 
[P(F)]₄
Compound name(s): 
tetra[(trifluoromethyl)cyclotetraphosphine]
Central atom: 
Phosphorus
Attached groups: 
F (fluoro)
Charge on central atom: 
0
Compound type: 
Oligomer
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

[Sn(Br)₂{O=CH(NMe₂)-κO}]

Formula Unicode styled: 
[Sn(Br)₂{O=CH(NMe₂)-κO}]
Compound name(s): 
dibromo-(N,N-dimethylformamide)-tin
Central atom: 
Tin
Attached groups: 
Br (bromo)
O=CH(NMe₂) (dimethylformamido-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: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Sn«V2C3OIIE8B3Z0X2L1»
[MLXZ]𝘲 class: 
[MX2L1]
MLXZ class (ENC, equivalent neutral class): 
MX2L1

[Sn(I)₂(Dmso-κO)]

Formula Unicode styled: 
[Sn(I)₂(Dmso-κO)]
Compound name(s): 
bis(iodo)-[dimethyl sulfoxide]-tin
Central atom: 
Tin
Attached groups: 
I (iodo)
Dmso (dimethylsulfoxide-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: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Sn«V2C3OIIE8B3Z0X2L1»
[MLXZ]𝘲 class: 
[MX2L1]
MLXZ class (ENC, equivalent neutral class): 
MX2L1

[Sn(I)₂{O=CH(NMe₂)-κO}]

Formula Unicode styled: 
[Sn(I)₂{O=CH(NMe₂)-κO}]
Compound name(s): 
(N,N-dimethylformamide)-bis(iodo)-tin
Central atom: 
Tin
Attached groups: 
I (iodo)
O=CH(NMe₂) (dimethylformamido-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: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Sn«V2C3OIIE8B3Z0X2L1»
[MLXZ]𝘲 class: 
[MX2L1]
MLXZ class (ENC, equivalent neutral class): 
MX2L1

[Sn(Cl)₂{O=CH(NMe₂)-κO}]

Formula Unicode styled: 
[Sn(Cl)₂{O=CH(NMe₂)-κO}]
Compound name(s): 
dichloro-(N,N-dimethylformamide)-tin
Central atom: 
Tin
Attached groups: 
Cl (chloro)
O=CH(NMe₂) (dimethylformamido-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: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Sn«V2C3OIIE8B3Z0X2L1»
[MLXZ]𝘲 class: 
[MX2L1]
MLXZ class (ENC, equivalent neutral class): 
MX2L1

[Sn(C₂F₅)₂(PMe₃)]

Formula Unicode styled: 
[Sn(C₂F₅)₂(PMe₃)]
Compound name(s): 
bis(pentafluoroethyl)-(trimethylphosphine)-tin
Central atom: 
Tin
Attached groups: 
C₂F₅ (perfluoroethyl)
PMe₃ (trimethylphosphane)
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: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Sn«V2C3OIIE8B3Z0X2L1»
[MLXZ]𝘲 class: 
[MX2L1]
MLXZ class (ENC, equivalent neutral class): 
MX2L1

[Sn(N₃)₂(NC₅H₄Me)]

Formula Unicode styled: 
[Sn(N₃)₂(NC₅H₄Me)]
Compound name(s): 
diazido-bis(4-methylpyridine)-tin
Central atom: 
Tin
Attached groups: 
N₃ (azido)
NC₅H₄Me (4-methylpyridine)
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: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Sn«V2C3OIIE8B3Z0X2L1»
[MLXZ]𝘲 class: 
[MX2L1]
MLXZ class (ENC, equivalent neutral class): 
MX2L1

[Sn([9]aneS₃-κ³S)]²⊕

Formula Unicode styled: 
[Sn([9]aneS₃-κ³S)]²⊕
Compound name(s): 
(1,4,7-trithionane)-tin(2+)
Central atom: 
Tin
Attached groups: 
[9]aneS₃ (1,4,7-trithiocyclononane-κ³S)
Charge on central atom: 
2
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: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Sn«V2C3OIIE8B3Z0X0L3»2⊕
[MLXZ]𝘲 class: 
[ML3]2+
MLXZ class (ENC, equivalent neutral class): 
MX2L1

[Sn(Tp*-κ³N)]⊕

Formula Unicode styled: 
[Sn(Tp*-κ³N)]⊕
Compound name(s): 
{hydrogen tris(3,5-dimethylpyrazolyl)borato}-tin(1+)
Central atom: 
Tin
Attached groups: 
Tp* (hydrotris(3,5-dimethylpyrazolyl)borato-κ³N)
Charge on central atom: 
1
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: 3
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
Sn«V2C3OIIE8B3Z0X1L2»⊕
[MLXZ]𝘲 class: 
[MX1L2]+
MLXZ class (ENC, equivalent neutral class): 
MX2L1