Abstract The Staudinger reaction of 2,5‐bis((di‐ tert ‐butylphosphaneyl)methyl)‐1 H ‐pyrrole ( t Bu PNP)H; PNP=C 4 2 N‐2,5‐CH P ) with equiv. Me 3 SiN cleanly furnishes 1,1′‐((1 ‐pyrrole‐2,5‐diyl)bis(methylene))bis(1,1‐di‐ ‐butyl‐ N ‐(trimethylsilyl)‐λ 5 ‐phosphanimine) 1 ; (NPNPN)H, NPNPN=C NSiMe in excellent yield. Pyrrole is easily deprotonated by alkali metal amides, [MN(SiMe ] (M=Li, Na, K...

A structure-property relationship study of neutral heteroleptic (1 and 2, [Ir(C∧N)2(L∧X)]) and homoleptic (3 and 4, fac-[Ir(C∧N)3]) Ir(III) complexes (where L∧X = anionic 2,2,6,6-tetramethylheptane-3,5-dionato-κO3,κO6 (thd) and C∧N = a cyclometalating ligand bearing a pentafluorosulfanyl (-SF5) electron-withdrawing group (EWG) at the C4 (HL1) and C3 (HL2) positions of the phenyl moiety) is pres...

In the present work, we attempted to develop new metal coordination complexes of the natural flavonoid 5-hydroxyflavone with Sm(III), Eu(III), Gd(III), Tb(III). The resultant hydroxo complexes have been characterized by a variety of spectroscopic techniques, including fluorescence, FT-IR, UV-Vis, EPR and mass spectral studies. The general chemical formula of the complexes is [Ln(C15H₉O₃)₃(OH)₂(...

The excited state reactivity of Ru(ii) complexes continues to be a topic of intense investigation because of their widespread use in applications related to solar energy conversion, such as in photoswitches and for medicinal chemistry. In an effort to gain further understanding of photoinduced ligand exchange and isomerization in Ru(ii) complexes, various isomers of the formula [Ru(PTPI)2(CH3CN...

Chapter 1. Group 7 organohydrazide complexes can be classified into eight monohapto structural types on the basis of X-ray structural data. Classification on this basis provides a way for uniform identification of the ligand structural types present in a complex and for uniform assignment of oxidation states of the metal. Chapter 2. The organohydrazide chelate complexes, M(III)(NNpy)(PPh 3)2C12...

X-ray structures of five bis(N — R-salicylaldiminato)zinc(II) complexes with R — ethyl, «-propyl, /-propyl, «-butyl and 4-thia-rc-hexyl were determined. The N202 coordination geometry is in all cases gwas/-tetrahedral with the dihedral angle between the planes of the two chelate rings ranging from 84 to 89°. Bond lengths and angles in the coordination sphere are not affected by the nature of R ...

The products obtained by forcing the reaction with nucleosides (guanosine, Guo, and adenosine, Ado) of potential anticancer drugs for nongenomic targets [PtCl(O,O'-acac)(L)] (L = dimethyl sulfoxide, DMSO; dimethyl sulfide, DMS), closely related to their very powerful organometallic analogues [Pt(O,O'-acac)(γ-acac)(L)], have been studied. [PtCl(O,O'-acac)(L)] and [Pt(O,O'-acac)(γ-acac)(L)] compl...

In this paper we explore cisplatin interactions with sulfur-containing amino acids in a polarizable continuum model. Two cisplatin hydrated complexes were considered as reactants (chloro complex, cis-[Pt(NH3)2Cl(H2O)]+; hydroxo complex, cis-[Pt(NH3)2(OH)(H2O)]+). We considered the following reaction mechanism: first step, substitution of the aqua ligand by amino acid; second step, dissociative ...

The current importance of nitrogen heterocyclic carbene (NHC) ligands in several areas of coordination chemistry and catalysis can hardly be overemphasized. The deprotonation of imidazolium salts is the prime route to NHCs; however, the study of the transformations relating imidazole and NHC ligands is still an emerging area of research. The thermodynamic preference for Nor C-coordination in im...

In this paper, two double helical dinuclear copper(II) complexes of bis-N,O-bidentate Schiff base ligands bis(3-methoxy-N-salicylidene-4,4'-diaminodiphenyl)sulfone (L1) and bis(5-bromo-N-salicylidene-4,4'-diaminodiphenyl)sulfone (L2) were prepared and characterized by elemental analyses (CHN), as well as thermal analysis. Elemental analyses (CHN) suggested that the reaction between ligands and ...