Journal of Chemistry / 2017 / Article / Tab 6

Research Article

Synthesis, Characterization, and Catalytic Studies of Mn(III)-Schiff Base-Dicyanamide Complexes: Checking the Rhombicity Effect in Peroxidase Studies

Table 6

Peroxidase activity for complexes 122, axial and equatorial crystal distances around the manganese ion for each complex with solved crystallographic structure, resulting tetragonal elongation, and corresponding reference.

Complex Crystal distancesTetragonal elongationPeroxidase activityReference
Mn-Mn-

1 2.281.8701.2233 ± 2This work
2 [MnL2(D)(DCA)](D)un.un.un.53 ± 3This work
3 [MnL3(D)(DCA)]un.un.un.1.9 ± 0.4This work
4 [MnL4(D)2(DCA)2]2.3031.8851.22537 ± 2[16]
5 [MnL5(D)2](NO3)(D)2.3261.8721.24334 ± 3[22]
6 [MnL5(D)Cl](D)2.52.3181.8781.23431 ± 2[15]
7 [MnL5(D)2](ClO4)2.3141.8651.2419 ± 2[23]
8 [MnL6(D)2](NO3)(D)2.3731.8621.2750 ± 3[15]
9 [MnL7(D)2](NO3)(D)2.2631.8801.20332 ± 1[22]
10 [MnL8(D)2](NO3)(D)2.2711.8701.21433 ± 1[24]
11 [MnL1(D)2](ClO4)2.361.8511.2730 ± 3[23]
12A [MnL2(D)2](NO3)(D)2.2461.8711.20029 ± 1[15]
12B [MnL2(D)(D2)](NO3)2.2581.8791.20229 ± 1[15]
13 [MnL2(D)(OAc)](D)2.2821.8931.20533 ± 1[15]
14A [MnL2(D)(O2CEt)]2.3081.8691.23528 ± 2[14]
14B [MnL2(D)(O2CEt)]2.3381.8761.24628 ± 2[14]
15 [MnL2(D)(O2CPe)]2.3391.8651.25439 ± 2[14]
16 [MnL9(D)2](NO3)(D)22.251.8721.20218 ± 1[15]
17 [MnL10(D)2](NO3)(D)22.2431.8891.1872.0 ± 0.4[24]
18 [MnL11(D)(D2)](ClO4)2.2031.8631.1833.2 ± 0.4[25]
19 [MnL12(D)2](ClO4)(D)2.221.881.1812.4 ± 0.4[26]
20 [MnL13(D)2](ClO4)(D)2.211.901.1632.1 ± 0.4[27]
21 [MnL14(D)2](NO3)(D)22.2061.9041.1591.1 ± 0.3[22]
22 [MnL15(D)2](NO3)(D)22.2581.8881.1961.8 ± 0.3[24]

Tetragonal elongation expressed as the ratio between the manganese-axial oxygen distances and the manganese-equatorial oxygen distances. Peroxidase activity expressed as percentage of conversion of ABTS to ABTS•+ measured 10 min after mixing the solutions; D = H2O or other solvent molecule (such as CH3OH); un.: unavailable (structure not solved).

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