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Synthesis and characterization and antibacterial activity of some new transition metal complexes with ciprofloxacin-imine

“…The spectrum of Schiff base Cr(III) complex show two absorption bands 624 and 569 nm which are assigned to T 1g (F) transitions, respectively, in favor of octahedral geometry [48]. The reflectance spectrum of Mn(II) complex showed two identified (CH 3 COO) 3 …”

Syntheses, Characterization and Antimicrobial Studies of Coordination Compounds of Schiff Base Possessing Semicarbazone Moiety

“…This band shifts to higher energy by 25-37 cm -1 in 2-10, supporting the involvement of phenolic O atom towards coordination. 12 The magnitude of the high positive shift of the ν(C-O)ɸ stretch indicates the dimeric nature of all coordination compounds 13 . The ν(C=N) azomethine stretch of 1 occurring at 1622 cm -1 undergoes a negative shift by 20-35 cm -1 in 2-10, indicating the involvement of azomethine N atom towards coordination 14 .…”

β-Cyclodextrin-promoted synthesis of 2-phenylbenzimidazole in water using air as an oxidant

“…A number of methods have been reported for the synthesis of 2-substituted benzimidazoles, including condensation of ophenylenediamines with carboxylic acids or their derivatives in the presence of strong acids [8][9][10], oxidative cyclo-dehydrogenation of aniline Schiff's bases, derivation from the condensation of ophenylenediamines and aldehydes, using various oxidants such as nitrobenzene [11][12][13], 1,4-benzoquinone [14], DDQ [15,16], tetracyanoethylene [17], benzofuroxan [18], MnO 2 [19], Pb(OAc) 4 [20], oxone [21], NaHSO 3 [22,23], Na 2 S 2 O 5 [24], I 2 /KI/K 2 CO 3 [25], O 2 [26], air [27] and H 2 O 2 [28]. However, most of these methods reported so far suffer from disadvantages such as the use of hazardous organic solvents or reagents, harsh reaction conditions, low yields, co-occurrence of side reactions and using transition metal catalysts.…”