O (oxo ZL₂)

The kind of O seen in phosphine oxides where there are two π interactions between filled O 2p orbitals and P_R sigma* orbitals

[C(H)₂{P(OH)₂O}₂]

Formula Unicode styled: 
[C(H)₂{P(OH)₂O}₂]
Compound name(s): 
[C(H)₂{P(OH)₂O}₂]
Central atom: 
Phosphorus
Attached groups: 
CR₂X (alkyl)
OH (hydroxo)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

trans–[W(Cl)₄(PhC≡CPh)(OPCl₃)]

Formula Unicode styled: 
trans–[W(Cl)₄(PhC≡CPh)(OPCl₃)]
Compound name(s): 
(η²-Diphenylacetylene)-tetrachloro-(trichlorophosphine oxide-O)-tungsten
Central atom: 
Phosphorus
Attached groups: 
Cl (chloro)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[Nb(Cl)₅(OPCl₃)]

Formula Unicode styled: 
[Nb(Cl)₅(OPCl₃)]
Compound name(s): 
pentachloro-(Trichlorophosphaneoxide)
Central atom: 
Phosphorus
Attached groups: 
Cl (chloro)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[Mg(OAsMe₃)₅]²⊕

Formula Unicode styled: 
[Mg(OAsMe₃)₅]²⊕
Compound name(s): 
pentakis(Trimethylarsine oxide) magnesium(2+)
Central atom: 
Arsenic
Attached groups: 
Me (methyl)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
As«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(Ph)₂(OH)(O)]

Formula Unicode styled: 
[P(Ph)₂(OH)(O)]
Compound name(s): 
Diphenylphosphinic acid
Central atom: 
Phosphorus
Attached groups: 
Ph (phenyl)
OH (hydroxo)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(Ph)(OH)₂(O)]

Formula Unicode styled: 
[P(Ph)(OH)₂(O)]
Compound name(s): 
Benzenephosphonic acid
Central atom: 
Phosphorus
Attached groups: 
Ph (phenyl)
OH (hydroxo)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(Me)₂(OH)(O)]

Formula Unicode styled: 
[P(Me)₂(OH)(O)]
Compound name(s): 
Dimethylphosphinic acid
Central atom: 
Phosphorus
Attached groups: 
Me (methyl)
OH (hydroxo)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(Tol-o)₃(O)]

Formula Unicode styled: 
[P(Tol-o)₃(O)]
Compound name(s): 
tris(Tri-o-tolylphosphine)oxide
Central atom: 
Phosphorus
Attached groups: 
Tol-o (o-tolyl)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(OPh)₃(O)]

Formula Unicode styled: 
[P(OPh)₃(O)]
Compound name(s): 
Triphenyl phosphate
Central atom: 
Phosphorus
Attached groups: 
OPh (phenoxy)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(OMe)(OCH₂CH₂O)(O)]

Formula Unicode styled: 
[P(OMe)(OCH₂CH₂O)(O)]
Compound name(s): 
Methyl ethylene phosphate
Central atom: 
Phosphorus
Attached groups: 
OMe (methoxy)
OCH₂CH₂O (ethanediolato-κO,κO)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(OH){(CH₂)₄}(O)]

Formula Unicode styled: 
[P(OH){(CH₂)₄}(O)]
Compound name(s): 
P-Oxo-P-hydroxo-phospholane
Central atom: 
Phosphorus
Attached groups: 
OH (hydroxo)
(CH₂)₄ (tetramethylene-κ²C)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(OEt)₃(O)]

Formula Unicode styled: 
[P(OEt)₃(O)]
Compound name(s): 
Triethyl phosphate
Central atom: 
Phosphorus
Attached groups: 
OEt (ethoxy)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(NMe₂)₃(O)]

Formula Unicode styled: 
[P(NMe₂)₃(O)]
Compound name(s): 
Hexamethylphosphamide
Central atom: 
Phosphorus
Attached groups: 
NMe₂ (dimethylamino)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(NHPh)₂(H)(O)]

Formula Unicode styled: 
[P(NHPh)₂(H)(O)]
Compound name(s): 
bis(Anilino)-oxido-phosphine
Central atom: 
Phosphorus
Attached groups: 
NHPh (phenylamino)
H (hydrido)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(NH₂)(Ph)₂(O)]

Formula Unicode styled: 
[P(NH₂)(Ph)₂(O)]
Compound name(s): 
Diphenylphosphinamide
Central atom: 
Phosphorus
Attached groups: 
NH₂ (amino)
Ph (phenyl)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(CH₂CH₂CN)₃(O)]

Formula Unicode styled: 
[P(CH₂CH₂CN)₃(O)]
Compound name(s): 
tris(2-Cyanoethyl)phosphine oxide
Central atom: 
Phosphorus
Attached groups: 
CH₂CH₂CN (cyanoethyl)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(C₆H₄NO₂)₃(O)]

Formula Unicode styled: 
[P(C₆H₄NO₂)₃(O)]
Compound name(s): 
Tri(p-nitrophenyl)-phosphate
Central atom: 
Phosphorus
Attached groups: 
C₆H₄NO₂ (p-nitro-phenyl)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(C₆F₅)(Ph)₂(O)]

Formula Unicode styled: 
[P(C₆F₅)(Ph)₂(O)]
Compound name(s): 
Diphenyl-pentafluorophenylphosphine-oxide
Central atom: 
Phosphorus
Attached groups: 
C₆F₅ (pentafluorophenyl)
Ph (phenyl)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[P(Buᵗ)₂(OH)(O)]

Formula Unicode styled: 
[P(Buᵗ)₂(OH)(O)]
Compound name(s): 
Di-t-butylphosphinic acid
Central atom: 
Phosphorus
Attached groups: 
Buᵗ (t-butyl)
OH (hydroxo)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
P«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[As(Ph)₃(O)]

Formula Unicode styled: 
[As(Ph)₃(O)]
Compound name(s): 
Triphenyl-oxo-arsenic
Central atom: 
Arsenic
Attached groups: 
Ph (phenyl)
O (oxo ZL₂)
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: 4
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
As«V5C4OVE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1