EN: 22

trans–[Np{(O)₂}(OPPh₃)₄]⊕

Formula Unicode styled: 
trans–[Np{(O)₂}(OPPh₃)₄]⊕
Compound name(s): 
Dioxo-tetrakis(triphenylphosphine oxide-O)-neptunium(V)
Central atom: 
Neptunium
Attached groups: 
(O)₂ (di{oxo ⭀O X₂L} trans Ⓢ)
OPPh₃ (triphenylphosphane oxide)
Charge on central atom: 
1
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: 6
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 22
Summary of calculated classifications: 
Np«V5C6OVE22B10Z0X4L6»⊕
[MLXZ]𝘲 class: 
[MX4L6]+
MLXZ class (ENC, equivalent neutral class): 
MX5L5

[Np{η⁵-C₅H₄(SiMe₃)}₃]

Formula Unicode styled: 
[Np{η⁵-C₅H₄(SiMe₃)}₃]
Compound name(s): 
tris{(trimethylsilyl)cyclopentadienyl}-neptunium
Central atom: 
Neptunium
Attached groups: 
C₅H₄(SiMe₃) (η⁵-(trimethylsilyl)cyclopentadienyl)
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: 9
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 22
Summary of calculated classifications: 
Np«V3C9OIIIE22B9Z0X3L6»
[MLXZ]𝘲 class: 
[MX3L6]
MLXZ class (ENC, equivalent neutral class): 
MX3L6

[Np(OH₂)₉]³⊕

Formula Unicode styled: 
[Np(OH₂)₉]³⊕
Compound name(s): 
nonaaqua-neptunium
Central atom: 
Neptunium
Attached groups: 
OH₂ (aqua)
Charge on central atom: 
3
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: 9
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 22
Summary of calculated classifications: 
Np«V3C9OIIIE22B9Z0X0L9»3⊕
[MLXZ]𝘲 class: 
[ML9]3+
MLXZ class (ENC, equivalent neutral class): 
MX3L6