ammonium cyanide
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Author(s):  
LUTZ GALICH ◽  
HEINER HÜCKSTÄDT ◽  
HEINER HOMBORG

The title complex salt has been isolated from a solution of chlorotetraphenylporphyrinatomanganese(III) and tetra(n-butyl)ammonium cyanide in dichloromethane. The complex salt crystallizes as a hydrate-dichloromethane solvate in the orthorhombic space group Pbca (no. 61) with cell parameters as follows: a = 21.491(5) Å, b = 21.706(5) Å, c = 28.489(5) Å, V = 13 290(5) Å3, Z = 8. The structure is that expected for a hexa-coordinated low-spin Mn ( III ) tetraphenylporphyrinate (magnetic moment: μ eff = 3.1 ± 0.2 μ B at 273 K). The Mn atom is in the centre of the slightly ruffled porphyrinato core. The Mn - C CN distance of 2.01(2)/2.02(2) Å and the Mn - N p distance, varying between 1.972(13) and 2.016(14) Å, are normal values. The Mn - C CN - N group is bent (171(2)/174(2) °). At low temperatures, a molecular electronic resonance Raman effect is detected at 198 and 344 cm−1. It is attributed to intraconfigurational transitions Γ 1g → Γ 4g and Γ 1g → Γ 3g Γ 5g , respectively, arising from the spin-orbit split 3 T 1g ground state of low-spin Mn ( III ), assuming pseudo-octahedral symmetry. Weak Q and intense B (Soret) transitions at 17 300 and 23 200 cm−1, respectively, as well as four weak trip–multiplet transitions are observed at 8650, 12 000, 14 900 and 19 900 cm−1.





1985 ◽  
Vol 21 (4) ◽  
pp. 356-363 ◽  
Author(s):  
Z. D. Draganić ◽  
I. G. Draganić ◽  
J. A. Azamar ◽  
S. I. Vujošević ◽  
M. D. Berber ◽  
...  


1985 ◽  
Vol 100 (2) ◽  
pp. 281-284 ◽  
Author(s):  
E.Liam Boyle ◽  
Elaine S. Dodsworth ◽  
David Nicholls ◽  
T.Anthony Ryan
Keyword(s):  


1985 ◽  
Vol 16 (2) ◽  
Author(s):  
E. S. DODSWORTH ◽  
J. P. EATON ◽  
M. P. ELLERBY ◽  
D. NICHOLLS


1984 ◽  
Vol 89 (2) ◽  
pp. 143-145 ◽  
Author(s):  
Elaine S. Dodsworth ◽  
Janice P. Eaton ◽  
Michael P. Ellerby ◽  
David Nicholls




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