[Mn(Cl)(⭀NBuᵗ)₃]

Formula Unicode styled: 
[Mn(Cl)(⭀NBuᵗ)₃]
Compound name(s): 
tris(t-Butylimido)-chloro-manganese
Central atom: 
Manganese
Charge on formula unit (QN): 
0
Attached groups: 
Cl (chloro)
(⭀NBuᵗ)₃ (tri(⭀NBuᵗ t-butylimino) Ⓢ)
Compound type: 
Molecular
Notes: 

At first sight the electron number (EN) for the metal is 20. However the three ⭀NBuᵗ groups are connected to the metal (approximately C3v through σ and π bonds but one of the π-set for the three ⭀NBuᵗ groups is A2. That has no match on the nine available orbitals in a C3v environment meaning the overall electron count for the metal is 18 rather than 20. I don't see an immediate reference for this so if my analysis is incorrect, or of you know of an appropriate reference, please let me know.

DOI link to literature report: 
10.1039/c39930000495
Crystal data CSD link: 
wafyux
Crystal data ICSD link: 
Valence Number (VN) = 𝘹 + 2𝘻 : 
VN: 7
Coordination Number (CN, sum of attached group denticities): 
CN: 4
Oxidation Number (ON) (Roman numerals): 
ON: (VII)
Electron Number (EN) = 𝘮 + 𝘹 +2𝘭: 
EN: 18
Bond number (BN) = 𝘹 + 𝘭 + 𝘻: 
9
[MLXZ]𝘲 class: 
[MX7L2]
MLXZ class (ENC, equivalent neutral class): 
MX7L2
Summary of calculated classifications: 
Mn«V7C4OVIIE18B9Z0X7L2»
Geometry: 
4-coordinate: tetrahedron (T-4)
𝘥-electron configuration = 𝘮 – VN: 
d0
𝘥-electron configuration = 𝘮 – ON: 
d10
𝘥-electron configuration = 𝘮 – VN – 𝘲 from [MLXZ]𝘲: 
d0
Attached atoms: 
Cl1N3
Phase: 
Solid
InChIKey (see www.inchi-trust.org): 
YQFRDVACQODRPO-UHFFFAOYSA-M