Report No xxxx - Instytut Fizyki JÄ drowej PAN

Table 1. 35 Cl – NQR results for tetrachlorophthalmide salts at 77K (ν Q – 35 Cl-NQR frequency, δν Q – full width
at half-intensity).
Lp. COMPOUND STRUCTURAL FORMULA ν Q [MHz] δν Q [kHz]
1
2
3
4
Lithium salt of
tetrachlorophthalimide
Sodium salt of
tetrachlorophthalimide
Potassium salt of
tetrachlorophthalimide
Cesium salt of
tetrachlorophthalimide
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
Cl
O
N
O
O
N
O
O
N
O
O
N
O
38.483
38.748
Li
39.484
39.556
K
Cs
19
31
12
18
37.412 19
37.547
31
Na
37.582
10
37.613
11
36.928
37.205
38.077
38.102
14
14
24
22
35.701 15
36.932
10
37.021
24
38.504 18
On the basis of [1,2] the experimental dependence ν Q
(R) was approximated by a
theoretical function of the form:
⎛ R ⎞
ν Q = a + b exp⎜
− ⎟
(1)
⎝ c ⎠
where a,b,c – constants; R –the ionic radius of the substituent.
The coupling of the strongly polar oxygen atoms with the chlorine atoms Cl(1) and
Cl(4) leads to a decrease in the electron density on the nuclei of these atoms, so to an increase
in the observed 35 Cl-NQR frequencies (Fig.2).
The correlation of the data obtained in this study with the bactericidal activity of the
compounds studied could help search for the derivatives of tetrachlorophtalimide showing
higher effectiveness.
References:
1. E.B.Bryll, J. Chem. Phys., 61, 424 (1974).
2. A.Walczak, Struktura elektronowa i dynamika molekularna chloranów ołowiu i cezu, badane za pomocą
spektroskopii jądrowego rezonansu kwadrupolowego, praca magisterska, Wydział Fizyki UAM (2000).
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