Tantalum

cis–[Ta(Br)₂(PMe₂Ph)₄]

Formula Unicode styled: 
cis–[Ta(Br)₂(PMe₂Ph)₄]
Compound name(s): 
Dibromo-tetrakis(dimethylphenylphosphine)-tantalum
Central atom: 
Tantalum
Attached groups: 
Br (bromo)
PMe₂Ph (dimethylphenylphosphane)
Charge on central atom: 
0
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 2
Oxidation Number (ON) (Roman numerals): 
ON: (II)
Coordination Number (CN, sum of attached group denticities): 
CN: 6
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 15
Summary of calculated classifications: 
Ta«V2C6OIIE15B6Z0X2L4»
[MLXZ]𝘲 class: 
[MX2L4]
MLXZ class (ENC, equivalent neutral class): 
MX2L4

cis–[Ta(CO)₂(Dmpe)₂]⊖

Formula Unicode styled: 
cis–[Ta(CO)₂(Dmpe)₂]⊖
Compound name(s): 
dicarbonyl-bis(1,2-bis(dimethylphosphino)ethane-P,P')-tantalum(1-)
Central atom: 
Tantalum
Attached groups: 
CO (carbonyl)
Dmpe (1,2-bis-(dimethylphosphino)ethane)
Charge on central atom: 
-1
Compound type: 
Molecular
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 1
Oxidation Number (ON) (Roman numerals): 
ON: (-I)
Coordination Number (CN, sum of attached group denticities): 
CN: 6
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Summary of calculated classifications: 
Ta«V1C6O-IE18B7Z0X0L6»⊖
[MLXZ]𝘲 class: 
[ML6]-
MLXZ class (ENC, equivalent neutral class): 
MX1L6