The IR and Raman spectra of 2-amino pyrimidine complexes of some Zn(II), Cd(II) and Hg(II) halides

Contreras, J. G.; Seguel, G. V.; Gnecco, Juan A.

doi:10.1016/0584-8539(92)80043-v

Cited by 38 publications

(12 citation statements)

References 21 publications

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“…spectra of all complexes showed an upward shift relative to that of the free AllPmTu for the bands characteristic of pyrimidine ring vibrations, which appeared in the ranges 1605-1610 and 1548-1552 cm )1 . These band shifts suggest that the ligand coordinates in all complexes via one nitrogen of the pyrimidine moiety to the metal ions [10,11]. This result is supported by the appearance of new bands at ca.…”

Section: Ir Spectrasupporting

confidence: 52%

Nickel(II), palladium(II) and platinum(II) complexes of N-allyl-N′-pyrimidin-2-ylthiourea

Kandil

Katib

Yarkandi

2007

Transition Met Chem

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Platinum(II), palladium(II) and nickel(II) complexes with N-allyl-N¢-pyrimidin-2-ylthiourea were synthesized in 1:1 and 1:2 [metal:ligand] stoichiometric ratios and characterized by elemental analyses, molar conductivities, magnetic susceptibilities and by i.r., u.v.-vis., 1 H-and 13 C-n.m.r. and mass spectra. The 1 H-and 13 C-n.m.r. chemical shifts reveal coordination of one pyrimidine-N and sulphur atoms to Pt II and Pd II . The i.r. spectra indicate that the ligand behaves as a neutral monodentate towards Ni II ; coordinates via a pyrimidine-N and as a bidendate towards Pd II and Pt II coordinates via thione-S and a pyrimidine-N. The magnetic moments and electronic spectral data suggest a square-planar geometry for Pt II and Pd II complexes, a mixture of square-planar and tetrahedral geometries for the tetracoordinate Ni II complex and octahedral for the six-coordinate one. The E.I. mass spectra of the complexes showed some isotope ion peaks of [M] + and fragments containing metals; assignments of fragments containing metal ions were supported by the appearance of their peaks among isotope clusters.

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Section: Ir Spectrasupporting

confidence: 52%

Nickel(II), palladium(II) and platinum(II) complexes of N-allyl-N′-pyrimidin-2-ylthiourea

Kandil

Katib

Yarkandi

2007

Transition Met Chem

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“…The reported wavenumbers are expected to be accurate within ±1 cm -1 . 1 H and 13 C nuclear magnetic resonance (NMR) spectra are recorded on a Bruker HC400 instrument. Chemical shifts for protons are reported in parts per million scale (delta scale) downfield from tetramethylsilane.…”

Section: Methodsmentioning

confidence: 99%

“…Nucleic acids are of great interest, since they control the manufacture of proteins and the functions of the cells in living organisms [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Quantum chemical calculations on elucidation of molecular structure and spectroscopic insights on 2-amino-4-methoxy-6-methylpyrimidine and 2-amino-5-bromo-6-methyl-4-pyrimidinol – A comparative study

Prabavathi¹,

Nilufer²

2015

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…The quite low N-H stretching frequencies were explained by intermolecular hydrogen bonding, as known from the X-ray structure. 1,52 In summary the luminescence of the parent ligands, especially 2-AP, seems to be a delicate topic due to excited states photophysics. To the best of our knowledge this has not received attention in the crystal-based literature yet but is kept in mind for future work in this field, especially for MOF-like materials consisting of 2-AP-based ligands and (poly)carboxylate co-ligands where hydrogen bonds might exist.…”

Section: Spectroscopic Properties Of the Ligands 1-3mentioning

confidence: 99%

Structural variety of 5-fluoroarene-2-aminopyrimidine in comparison to 2-aminopyrimidine silver(i) coordination polymers: progress report and overview

et al. 2013

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A variety of fluoroarene-2-aminopyrimidine (FAP) silver(I) coordination polymers (CPs) has been synthesized based on newly synthesized FAP derivatives, namely 5-(p-methoxytetrafluorophenyl)-2aminopyrimidine (OFAP) and 5-(p-dimethylaminotetrafluorophenyl)-2-aminopyrimidine (NFAP), and different counterions (OTf 2 , TFA 2 , ClO 4 2 , NO 3 2). Their solid-state assembly as well as optical properties in terms of luminescence and infrared (IR) spectroscopy were investigated. Out of the several structures described herein, we obtained isomorphic CPs to previous studies (5, 9), a CP architecture with a short Ag-Ag distance (8, 3.049 Å), but also polymorphic crystals of [Ag(nfap)NO 3 ] n (11a, 11b) and the latter showed differences in color and luminescence emission. Polymorphism gives an unparalleled possibility to investigate the origin of such phenomena since luminescence emission is quite often observed for these silver-hybrid solid-state materials and in several cases Ag … Ag interactions are attributed for this phenomenon. We show that this explanation does not necessarily have to be the only one. Therefore we focus also on structural relationships and differences in a comprehensive comparison of our own and other known systems to start a more systematic description of the rich coordination capabilities of FAP and congeneric 2-aminopyrimidine (2-AP) based silver(I) coordination polymers and networks. Density functional theory (DFT) calculations with periodic boundary conditions based on a plane wave basis are used to better understand the electronic structure of these crystalline materials. To complete the picture, steady-state spectroscopy studies (UV-Vis, fluorescence, IR) on all ligands and 2-AP itself were conducted as well as re-examination of the first reported CP of 2-AP and Ag I under the above aspects.

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The IR and Raman spectra of 2-amino pyrimidine complexes of some Zn(II), Cd(II) and Hg(II) halides

Cited by 38 publications

References 21 publications

Nickel(II), palladium(II) and platinum(II) complexes of N-allyl-N′-pyrimidin-2-ylthiourea

Nickel(II), palladium(II) and platinum(II) complexes of N-allyl-N′-pyrimidin-2-ylthiourea

Quantum chemical calculations on elucidation of molecular structure and spectroscopic insights on 2-amino-4-methoxy-6-methylpyrimidine and 2-amino-5-bromo-6-methyl-4-pyrimidinol – A comparative study

Structural variety of 5-fluoroarene-2-aminopyrimidine in comparison to 2-aminopyrimidine silver(i) coordination polymers: progress report and overview

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