THE STEREOCHEMISTRY OF THE NITROGEN ATOM, THE LENGTH OF THE PHOSPHORUS-NITROGEN BOND AND THEIR RELATIONSHIP TO 3 J(PNCC) SPIN-SPIN COUPLING CONSTANTS. THE CRYSTAL STRUCTURES OF N3P3[NMe(CH2)3NMe]Cl4, N4P4(NHEt)6(NEt), AND N4P4(NMe2)5(NHEt)(NEt)

Deutsch, W. Francis; Hursthouse, Michael B.; Kılıç, Zeynel; Parkes, Harold G.; Shaw, L. S.; Shaw, Robert A.

doi:10.1080/03086648708080655

Cited by 13 publications

(2 citation statements)

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“…Cyclophosphazene and poly(organo)phosphazene derivatives, which exhibit a variety of different functional groups and contain alternate P and N atoms in their cyclic and linear backbones, are an important family of inorganic systems. , It is well-known that ferrocene and its derivatives are very important compounds for photochemistry − and modern organometallic chemistry because of their outstanding stabilities, generating novel materials possessing interesting chemical, electrical, optical, and magnetic properties. , A scan of the literature shows that ferrocenylphosphazene derivatives are very limited. , The involvement of ferrocene derivatives with the phosphazene ring is also limited to monofunctional reagents for the preparation of electroactive ferrocenylphosphazenes , and dendrimers . To the best of our knowledge, there are no reports on the reactions of ferrocenyldiamines with N 3 P 3 Cl 6 in the literature.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus−Nitrogen Compounds. 18. Syntheses, Stereogenic Properties, Structural and Electrochemical Investigations, Biological Activities, and DNA Interactions of New Spirocyclic Mono- and Bisferrocenylphosphazene Derivatives

et al. 2009

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The reactions of hexachlorocyclotriphosphazatriene, N(3)P(3)Cl(6), with mono- (1 and 2) and bisferrocenyldiamines (3-5), FcCH(2)NH(CH(2))(n)NHR(1) (R(1) = H or FcCH(2)-), produce mono- (6 and 7) and spirocyclic bisferrocenylphosphazenes (8-10). The fully substituted phosphazenes (11-15 and 18-21) are obtained from the reactions of corresponding partly substituted phosphazenes (6-10) with excess pyrrolidine and NH(2)(CH(2))(3)ONa, respectively. The reactions of 6 with 1-aza-12-crown-4 afford geminal (16) and tris (17) crown ether-substituted phosphazenes. The structural investigations of the compounds have been verified by elemental analyses, mass spectrometry, Fourier transform IR, (1)H, (13)C, and (31)P NMR, and DEPT, COSY, HETCOR, and HMBC techniques. The crystal structures of 7, 10, 11, and 15 have been determined by X-ray crystallography. In 16 and 17, there are one and two stereogenic P atoms, respectively, and they are expected to be in enantiomeric mixtures. The structures of 18-21 look similar to a propeller. In 20 and 21, there are two stereogenic P atoms, and they exist as cis (meso; 20a and 21a) and trans (racemic; 20b and 21b) geometric isomers, according to the chiral solvating agent (S)-(+)-2,2,2-trifluoro-1-(9'-anthryl)ethanol experiments. Moreover, the compounds 18 and 19 have three stereogenic P atoms, and they exist as enantiomeric mixtures. Cyclic voltammetric investigations of compounds 6-21a reveal that ferrocene redox centers undergo oxidation concurrently at the same potential with basically reversible peaks, and these compounds appear to be quite robust electrochemically. The compounds 11-15 have been screened for antibacterial activity against gram positive and gram negative bacteria and for antifungal activity against yeast strains.The compounds 11, 12, 14, and 15 are evaluated for antituberculosis activity against reference strain Mycobacterium tuberculosis H37Rv (ATCC 27294). Interactions between compounds 11-15 and pBR322 plasmid DNA are studied by agarose gel electrophoresis. These compounds induce conformational changes in the DNA helix.

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Section: Introductionmentioning

confidence: 99%

Phosphorus−Nitrogen Compounds. 18. Syntheses, Stereogenic Properties, Structural and Electrochemical Investigations, Biological Activities, and DNA Interactions of New Spirocyclic Mono- and Bisferrocenylphosphazene Derivatives

et al. 2009

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“…Close inspections of the structure of 2 (Figure ) revealed that the sp 3 nitrogen atoms of the complexes have lost their trigonal pyramidal geometry and approach a trigonal planar geometry. This is true for some substituted nitrogen containing compounds having P–N bonds , . The loss of pyramidality at the sp 3 nitrogen center leads to an increase in bond angles around the nitrogen atoms.…”

Section: Resultsmentioning

confidence: 92%

Multidentate Pyridyl‐Aminophosphinite and Pyridyl‐Phosphoramidite Ruthenium(II) Complexes: Synthesis, Structure and Application as Levulinic Acid Hydrogenation Pre‐Catalysts

et al. 2019

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Novel multidentate pyridyl‐aminophosphinite (L1) and pyridyl‐phosphoramidite (L2) ligands of N^P^P^N‐donor system have been synthesized via a series of simple steps. The ligands are symmetrical and as a result, their reactions with [Ru(p‐cymene)Cl2]2 and [Ru(benzene)Cl2]2 lead to the formation of four monodentate bimetallic complexes (1–4) that retain the symmetry of the ligands. Meso and racemic mixtures (rac) of bidentate bimetallic complexes 5–8 were formed from the monodentate complexes through coordination of the pyridine nitrogen atoms to the two metal centers. The isomerism occurs at each metal center, which was evidenced by 31P{1H}, 1H NMR spectroscopy and single‐crystal X‐ray diffraction. The complexes were active towards hydrogenation of levulinic acid (LA) to γ‐valerolactone (GVL) using formic acid as the hydrogen source. The complexes are active at relatively low temperatures and are able to perform the hydrogenation in the absence of any additional solvent apart from the reagents to give high TON of 3 600. The catalysts are recyclable up to the fourth cycle, following which 20 % loss of activity is seen.

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Formation of novel spiro, spiroansa and dispiroansa derivatives of cyclotetraphosphazene from the reactions of polyfunctional amines with octachlorocyclotetraphosphazatetraene

et al. 2009

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Nucleophilic substitution reactions of N 4 P 4 Cl 8 , with di-, tri-, and tetra-functional reagents such as N-methyl-1,3-propanediamine, N,N′-methyl-1,3-propanediamine, spermidine and spermine were investigated in this study. Six novel products were isolated whose structures have been characterized by elemental analysis, mass spectrometry, 1 H and 31 P NMR spectroscopy. The structure of (11) was investigated by X-ray crystallography.

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THE STEREOCHEMISTRY OF THE NITROGEN ATOM, THE LENGTH OF THE PHOSPHORUS-NITROGEN BOND AND THEIR RELATIONSHIP TO ³ J(PNCC) SPIN-SPIN COUPLING CONSTANTS. THE CRYSTAL STRUCTURES OF N₃P₃[NMe(CH₂)₃NMe]Cl₄, N₄P₄(NHEt)₆(NEt), AND N₄P₄(NMe₂)₅(NHEt)(NEt)

Cited by 13 publications

References 13 publications

Phosphorus−Nitrogen Compounds. 18. Syntheses, Stereogenic Properties, Structural and Electrochemical Investigations, Biological Activities, and DNA Interactions of New Spirocyclic Mono- and Bisferrocenylphosphazene Derivatives

Phosphorus−Nitrogen Compounds. 18. Syntheses, Stereogenic Properties, Structural and Electrochemical Investigations, Biological Activities, and DNA Interactions of New Spirocyclic Mono- and Bisferrocenylphosphazene Derivatives

Multidentate Pyridyl‐Aminophosphinite and Pyridyl‐Phosphoramidite Ruthenium(II) Complexes: Synthesis, Structure and Application as Levulinic Acid Hydrogenation Pre‐Catalysts

Formation of novel spiro, spiroansa and dispiroansa derivatives of cyclotetraphosphazene from the reactions of polyfunctional amines with octachlorocyclotetraphosphazatetraene

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