New β-aminovinylketonates with annealated 1,2-benzothiazine-1,1-dioxide fragment

Coordination modes of 5-pyrazolones: A solid-state overview

“…1). Thus, L 6 was synthesized by methyla- tion of 4-aminoantipyrine with CH 2 O/HCOOH [43], L 7 and L 8 were prepared from the corresponding 1-methylthioisoquinoline and 4-aminoantipyrine [44] and HL 9 , L 10 and L 11 were obtained by condensing 4-aminoantipyrine with the corresponding aldehyde or ketone [44,45].…”

“…In some cases these changes lead to compounds such as [Cu(L 9 )2] [45,46] and [Ni(NO 3 ) 2 (L 11 ) 2 (H 2 O)] [47], in which only the donor atoms on the C4-substituent are bound to the metal (vide infra).…”

“…In [Cu(L 9 ) 2 ] [45,46] (Fig. 17), a complex obtained by reaction of the ligand and hydrated copper acetate, only the N3 and O2 atoms from the substituent on C 4 bind to the metal.…”

“…19). As in [Cu(L 9 ) 2 ] [45,46], none of the donor atoms of the antipyrine fragment is involved in the coordination to the metal, with L 11 only bound through the N atom of the pyridine ring. …”

“…When K 2 PdCl 4 and HL 45 were reacted in water (pH 8-9, adjusted with aqueous 1.0 M NH 3 ) and the isolated solid was recrystallized from MeCN/MeOH, the Pd(II) complex [Pd(L 45 ) 2 ] [96] (Fig. 40) was obtained.…”