≡CH (methylidyne)

[Ir(C≡CH)₂(CH=CH₂)(PPrⁱ₃)₂]

Formula Unicode styled: 
[Ir(C≡CH)₂(CH=CH₂)(PPrⁱ₃)₂]
Compound name(s): 
Diethynyl-vinyl-bis(tri-isopropylphosphine)-iridium
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Ir group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[I(C≡CH)(Ph)]⊕

Formula Unicode styled: 
[I(C≡CH)(Ph)]⊕
Compound name(s): 
Ethynyl(phenyl)iodine(1+)
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
I group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[Fe(C≡CH)(Dppe-κ²P)(Cp*)]

Formula Unicode styled: 
[Fe(C≡CH)(Dppe-κ²P)(Cp*)]
Compound name(s): 
(1,2-bis(Diphenylphosphino)ethane)-(ethynyl)-(η⁵-pentamethyl-cyclopentadienyl)-iron
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Fe group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[Fe(C≡CH)(CO)₂(Cp*)]

Formula Unicode styled: 
[Fe(C≡CH)(CO)₂(Cp*)]
Compound name(s): 
Dicarbonyl-(η⁵-pentamethyl-cyclopentadienyl)-ethynyl-iron
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Fe group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

fac–[Cr(C≡CH)₃([9]aneN₃-1,4,7-Me₃-κ³N)]

Formula Unicode styled: 
fac–[Cr(C≡CH)₃([9]aneN₃-1,4,7-Me₃-κ³N)]
Compound name(s): 
tris(Ethynyl)-(N,N',N''-trimethyl-1,4,7-triazacyclononane-N,N',N'')-chromium
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Cr group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

cis,cis,trans–[Ru(C≡CH)(Cl)(Dppm-κ²P)₂]

Formula Unicode styled: 
cis,cis,trans–[Ru(C≡CH)(Cl)(Dppm-κ²P)₂]
Compound name(s): 
Acetylide-chloro-bis(bis(diphenylphosphino)methane)-ruthenium
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Ru group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

cis–[Pt(C≡CH)₂(PEt₃)₂]

Formula Unicode styled: 
cis–[Pt(C≡CH)₂(PEt₃)₂]
Compound name(s): 
Diacetylido-bis(triethylphosphine)-platinum
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Pt group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

cis–[Au(C≡CH)(Me)₂(PPh₃)]

Formula Unicode styled: 
cis–[Au(C≡CH)(Me)₂(PPh₃)]
Compound name(s): 
Dimethyl-ethynyl-triphenylphosphine-gold
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Au group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[B(C≡CH)₃(Py)]

Formula Unicode styled: 
[B(C≡CH)₃(Py)]
Compound name(s): 
tris(Ethynyl)-(pyridine)boron
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
B group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[B(C≡CH)(Mes)₂]

Formula Unicode styled: 
[B(C≡CH)(Mes)₂]
Compound name(s): 
Ethynyl(dimesityl)boron
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
B group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[B(C≡CH)(=NH)]₃

Formula Unicode styled: 
[B(C≡CH)(=NH)]₃
Compound name(s): 
2,4,6-Triethynylborazine
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
B group (X type)
Charge on central atom: 
0
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: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

axial–[Co(C≡CH)(PMe₃)₄]

Formula Unicode styled: 
axial–[Co(C≡CH)(PMe₃)₄]
Compound name(s): 
Ethynyl-tetrakis(trimethylphosphine)-cobalt
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Co group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[Au(C≡CH)(PMePh₂)]

Formula Unicode styled: 
[Au(C≡CH)(PMePh₂)]
Compound name(s): 
(Diphenyl(methyl)phosphine)-ethynyl-gold
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Au group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[Au(C≡CH)(PTol₃)]

Formula Unicode styled: 
[Au(C≡CH)(PTol₃)]
Compound name(s): 
Ethynyl-(tri-p-tolylphosphine)-gold
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Au group (X type)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[C(H)(≡CH)]

Formula Unicode styled: 
[C(H)(≡CH)]
Compound name(s): 
Ethyne, acetylene
Central atom: 
Carbon
Attached groups: 
H (hydrido)
≡CH (methylidyne)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2O-IE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[C(O₂CPh-κO)(≡CH)]

Formula Unicode styled: 
[C(O₂CPh-κO)(≡CH)]
Compound name(s): 
Ethynyl benzoate
Central atom: 
Carbon
Attached groups: 
O₂CPh (benzoato-κO)
≡CH (methylidyne)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (I)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2OIE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[C(CN)(≡CH)]

Formula Unicode styled: 
[C(CN)(≡CH)]
Compound name(s): 
Cyanoacetylene
Central atom: 
Carbon
Attached groups: 
CN (cyano-κC)
≡CH (methylidyne)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (O)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2OOE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[C(≡CH)(Ph)]

Formula Unicode styled: 
[C(≡CH)(Ph)]
Compound name(s): 
Ethynylbenzene
Central atom: 
Carbon
Attached groups: 
≡CH (methylidyne)
Ph (phenyl)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (O)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
C«V4C2OOE8B4Z0L0X4»
[MLXZ]𝘲 class: 
[MX4]
MLXZ class (ENC, equivalent neutral class): 
MX4

[N(AsF₅)(≡CH)]

Formula Unicode styled: 
[N(AsF₅)(≡CH)]
Compound name(s): 
pentafluoro-(hydrogen cyanido)-arsenic
Central atom: 
Nitrogen
Attached groups: 
AsF₅ (pentafluoroarsenic)
≡CH (methylidyne)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 5
Oxidation Number (ON) (Roman numerals): 
ON: (-III)
Coordination Number (CN, sum of attached group denticities): 
CN: 2
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
N«V5C2O-IIIE8B4L0X3Z1»
[MLXZ]𝘲 class: 
[MX3Z1]
MLXZ class (ENC, equivalent neutral class): 
MX3Z1

[N(≡CH)]

Formula Unicode styled: 
[N(≡CH)]
Compound name(s): 
Hydrogen cyanide
Central atom: 
Nitrogen
Attached groups: 
≡CH (methylidyne)
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: 1
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 8
Summary of calculated classifications: 
N«V3C1O-IIIE8B3Z0L0X3»
[MLXZ]𝘲 class: 
[MX3]
MLXZ class (ENC, equivalent neutral class): 
MX3