C≡CSiBuᵗ₃ (tri-t-butylsilylalkynyl)

[Hf(C≡CSiBuᵗ₃)₆]²⊖

Formula Unicode styled: 
[Hf(C≡CSiBuᵗ₃)₆]²⊖
Compound name(s): 
hexakis(tri-t-butylsilylacetylene)-hafnium(2-)
Central atom: 
Hafnium
Attached groups: 
C≡CSiBuᵗ₃ (tri-t-butylsilylalkynyl)
Charge on central atom: 
-2
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (IV)
Coordination Number (CN, sum of attached group denticities): 
CN: 6
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 12
Summary of calculated classifications: 
Hf«V4C6OIVE12B6Z0L0X6»2⊖
[MLXZ]𝘲 class: 
[MX6]2-
MLXZ class (ENC, equivalent neutral class): 
MX4L2

[Ta(C≡CSiBuᵗ₃)₆]⊖

Formula Unicode styled: 
[Ta(C≡CSiBuᵗ₃)₆]⊖
Compound name(s): 
hexakis(tri-t-butylsilylalkynyl)-tantalum(1-)
Central atom: 
Tantalum
Attached groups: 
C≡CSiBuᵗ₃ (tri-t-butylsilylalkynyl)
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: 12
Summary of calculated classifications: 
Ta«V5C6OVE12B6Z0L0X6»⊖
[MLXZ]𝘲 class: 
[MX6]-
MLXZ class (ENC, equivalent neutral class): 
MX5L1