1035458-02-6Relevant articles and documents
Group-12 metal complexes with isomeric 1-(diphenylphosphino)-1′-[N- (pyridylmethyl)carbamoyl]ferrocenes: Coordination polymers vs. finite multinuclear coordination assemblies
Kuehnert, Janett,Cisarova, Ivana,Lamac, Martin,Stepnicka, Petr
, p. 2454 - 2464 (2008)
The isomeric ferrocene phosphine-carboxamides, 1-(diphenylphosphino)- 1′-{[N-(2-pyridyl)-methyl]carbamoyl}ferrocene (1) and 1- (diphenylphosphino)-1′-{[N-(4-pyridyl)methyl]carbamoyl}ferrocene (2) have been studied as ligands in group-12 metal bromide complexes. The reactions of 1 with CdBr2?4H2O and HgBr2 at 1:1 mole ratio gave the discrete tetracadmium complex [Cd2(μ-Br) 2(1-1κ2O,N2)2{μ- 1κ2O,N2:2κP-(C5H 4N)CH2NHC(O)fcPPh2-CdBr3} 2] (7; fc = ferrocene-1,1′-diyl) and the halogeno-bridged dimer [{Hg(μ-Br)Br(1-κP)}2] (8), respectively. In the presence of acetic acid, the CdBr2-1 system furnished a zwitterionic complex featuring protonated 1 as the P-monodentate donor, [CdBr3{Ph 2PfcC(O)NHCH2(C5H4NH)-κP}] ?H2O (6?H2O). Under neutral conditions, compound 2, whose terminal donor groups are better arranged for the formation of extended assemblies, gave rise to one-dimensional coordination polymers [MBr2{μ(P,N)-2}]n (M = Cd, 4; M = Hg, 5). The crystal structures of 2?H2O, its corresponding phosphine oxide (3?H2O), and complexes 4, 5, 6?H2O, 7 and 8 have been determined, revealing extensive hydrogen bonding interactions in the solid state. The Royal Society of Chemistry.