Contribution to the coordinative chemistry of rhodium. II. Rhodium(III) complexes with biguanide derivatives

1,1-Dimethylbiguanidium(2+) dinitrate

“…For applications of 1,1-dimethylbiguanide, see: Bell & Hadden (1997); Hopker (1961); Wiernsperger (2000). For 1,1-dimethylbiguanide in metal complexes, see: Gheorghiu (1969); Marchi et al (1999); Spacu & Gheorghiu (1968, 1969; Viossat et al (1995); Zhu et al (2002). For related structures of monocation salts, see: Hariharan et al (1989); He et al (2002); Huang et al (2008); Lu et al (2004a); Zhu et al (2003).…”

Study of chemical bonding, physical and biological effect of metformin drug as an organized medicine for diabetes patients with chromium(III) and vanadium(IV) ions

“…The width at half maximum (FWHM) of prominent intensity peak, relative intensity (%) and particle size of [Cr(MFN) 3 The crystallite size could be estimated from XRD patterns by applying FWHM of the characteristic peaks using Deby-Scherrer formula [49]. The particle size was estimated according to the highest value of intensity compared with the other peaks.…”

“…In the complexation manner of MFN with chromium(III) and vanadium(IV) metal ions, there are new bands due to charge transfer spectra from metal to ligand (M-L) or ligand to metal (L-M) can be observed and this data can be processed to obtain information regarding the structure and geometry of the complexes. Electronic absorption spectra of Cr(III) and VO(II) complexes were measured in DMSO with concentration of 10 À3 mol/cm 3 [34], this is due to the n ? p ⁄ transitions of imine (@NH), primary (ANH 2 ), secondary (ANH), and tertiary (AN(CH 3 ) 2 ) amino groups.…”

“…Metformin coordinates to the silicon atom in a neutral as well as a deprotonated form to yield two different types of complexes [2]. Many metformin complexes of Rh(III) [3], Ir(III) [4], Os(II) and Os(III) [5], Tc(V) and Re(V) complexes have been studied. Metformin with 2,6-pyridinedicarboxylic acid formed promising complex with Pd(II) as an insulin-mimic compound [6].…”

Synthesis, spectroscopic and antimicrobial studies of La(III), Ce(III), Sm(III) and Y(III) Metformin HCl chelates

“…Metformin coordinates to the silicon atom in a neutral as well as a deprotonated form to yield two different types of complexes [9]. Also, complexes of Metformin with Rh(III) [10], Ir(III) [11], Os(II) and Os(III) [12], Tc(V) and Re(V) complexes [13] have been studied.…”