5279-24-3Relevant academic research and scientific papers
Molybdenum dinitrogen complexes facially coordinated by linear tridentate PEP ligands (E = N or P): Impact of the central e donor in: Trans -position to N2
Hinrichsen, Svea,Schnoor, Ann-Christin,Grund, Katharina,Fl?ser, Benedikt,Schlimm, Alexander,N?ther, Christian,Krahmer, Jan,Tuczek, Felix
, p. 14801 - 14813 (2016/09/28)
The syntheses of molybdenum dinitrogen complexes supported by the tridentate PEP ligands (E = N, P) prPP(Ph)P = (Ph2PCH2CH2CH2)2P(Ph), prPPHP = (Ph2PCH2CH2CH2)2PH, PN(Ph)P = (Ph2PCH2CH2)2N(Ph) and prPN(Ph)P = (Ph2PCH2CH2CH2)2N(Ph) are reported. Together with the coligand dmpm = (CH3)2PCH2P(CH3)2 dinitrogen complexes of the type [Mo(N2)(PEP)(dmpm)] are formed. The new systems are characterized by IR and NMR spectroscopy and compared with the literature-known complex [Mo(N2)(dpepp)(dmpm)] (1) (dpepp = PhP(CH2CH2PPh2)2). The consequences of the substitution of the central P-donor of dpepp by N and the replacement of its C2 by C3 linkages as well as the exchange of the EPh by an EH function are investigated with respect to the stability of the corresponding N2-complexes. Importantly, the activation of the N2 ligand drastically increases upon replacing the trans-phosphine with a trans-amine donor.
Synthesis and characterization of selected 4,4′-diaminoalkoxyazobenzenes
Jeong, Euigyung,Freeman, Harold S.,Claxton, Larry D.
experimental part, p. 100 - 108 (2010/12/18)
The role of the -N(CH2CH2OH)2 group in producing a mutagenic response from 4-((3-(2-hydroxyethoxy)4-amino)phenylazo)-N,N-bis(2-hydroxyethyl)aniline has been investigated. To accomplish this goal, a group of substituted 4,4′-diaminoazobenzene dyes was synthesized, and their structures were confirmed using 1H NMR, TOF-LC-ESI mass spectrometry, and combustion analysis. Mutagenicity was determined using the standard Ames test in Salmonella strains TA98, TA100, and TA1538 with and without S9 enzyme activation. The results of this study provide evidence that the mutagenicity of the parent dye arises from the metabolic cleavage of N-hydroxyethyl groups to give the corresponding -NHCH2CH2OH and -NH2 substituted monoazo dyes as direct-acting mutagens. All 5 of the dyes studied were mutagenic at various levels with and without S9 enzyme activation in TA1538. In addition, the results show that removing one N-hydroxyethyl group and capping both -OH groups in the parent dye did not affect mutagenicity, whereas removing both N-hydroxyethyl groups produced a strong direct-acting mutagen in all three bacterial strains. Increasing the length of the N-alkyl chain from two to three carbon atoms eliminated mutagenicity in TA98 without S9 activation.
Mixed-Ligand Arenechromium Carbonyl Complexes as Electronic Modulators
Jones, Graham B.,Chapman, Brant J.,Mathews, Jude E.
, p. 2928 - 2938 (2007/10/03)
A number of mixed ligand η6 arenechromium carbonyl complexes have been prepared and investigated for their ability to effect electronic modulation of arene chemistry. In the case of an aniline-derived system, the arenechromium carbonyl complex is able to modulate the inductive capacity of the aniline nitrogen atom and thus, regulate its anchimeric ability. In the case of 8-phenylmenthol and benzyloxazolidinone derivatives, modulation of arene π basicity is achieved, and results suggest that important vinylarene π-π interactions exist in acrylate derivatives of these chiral auxiliary systems.
