(CO)₄ (tetracarbonyl, (C≡O)₄ trigonal bipyramidal C3v Ⓢ)

[Os(CO)₄]₂²⊖

Formula Unicode styled: 
[Os(CO)₄]₂²⊖
Compound name(s): 
bis-[tetracarbonyl-osmium(1-)] (Os—Os)
Central atom: 
Osmium
Attached groups: 
(CO)₄ (tetracarbonyl, (C≡O)₄ trigonal bipyramidal C3v Ⓢ)
Charge on central atom: 
-1
Compound type: 
Oligomer
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Os«V4C5O-IE18B7X1L4Z2»⊖
[MLXZ]𝘲 class: 
[MX1L4Z2]-
MLXZ class (ENC, equivalent neutral class): 
MX4L3

equatorial–[Ru{Fe(CO)₄}(CO)₄]²⊖

Formula Unicode styled: 
equatorial–[Ru{Fe(CO)₄}(CO)₄]²⊖
Compound name(s): 
(tetracarbonyl-iron)-tetracarbonyl-ruthenium(2-)
Central atom: 
Ruthenium
Attached groups: 
Fe(CO)₄ (tetracarbonyliron)
(CO)₄ (tetracarbonyl, (C≡O)₄ trigonal bipyramidal C3v Ⓢ)
Charge on central atom: 
-2
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-II)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Ru«V4C5O-IIE18B7X0L4Z3»2⊖
[MLXZ]𝘲 class: 
[ML4Z3]2-
MLXZ class (ENC, equivalent neutral class): 
MX4L3

axial–[Fe(CO)₄]₂²⊖

Formula Unicode styled: 
axial–[Fe(CO)₄]₂²⊖
Compound name(s): 
bis-[tetracarbonyl-iron(1-)]
Central atom: 
Iron
Attached groups: 
(CO)₄ (tetracarbonyl, (C≡O)₄ trigonal bipyramidal C3v Ⓢ)
Charge on central atom: 
-1
Compound type: 
Oligomer
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Fe«V4C5O-IE18B7X1L4Z2»⊖
[MLXZ]𝘲 class: 
[MX1L4Z2]-
MLXZ class (ENC, equivalent neutral class): 
MX4L3

axial–[Mn(CO)₄(PPh₃)]⊖

Formula Unicode styled: 
axial–[Mn(CO)₄(PPh₃)]⊖
Compound name(s): 
tetracarbonyl-triphenylphosphine-manganese(1-)
Central atom: 
Manganese
Attached groups: 
(CO)₄ (tetracarbonyl, (C≡O)₄ trigonal bipyramidal C3v Ⓢ)
PPh₃ (triphenylphosphane)
Charge on central atom: 
-1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 3
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Mn«V3C5O-IE18B7X0L5Z2»⊖
[MLXZ]𝘲 class: 
[ML5Z2]-
MLXZ class (ENC, equivalent neutral class): 
MX3L4

axial–[Mn(CO)₄(PEt₃)]⊖

Formula Unicode styled: 
axial–[Mn(CO)₄(PEt₃)]⊖
Compound name(s): 
tetracarbonyl-triethylphosphine-manganese(1-)
Central atom: 
Manganese
Attached groups: 
(CO)₄ (tetracarbonyl, (C≡O)₄ trigonal bipyramidal C3v Ⓢ)
PEt₃ (triethylphosphane)
Charge on central atom: 
-1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 3
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 5
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Mn«V3C5O-IE18B7X0L5Z2»⊖
[MLXZ]𝘲 class: 
[ML5Z2]-
MLXZ class (ENC, equivalent neutral class): 
MX3L4