THE EFFECT OF Ph UPON THE PRECIPITATION OF ZINC AMMONIUM PHOSPHATE

Ball, T. R.; Agruss, M. S.

doi:10.1021/ja01364a019

Cited by 11 publications

(2 citation statements)

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“…4), but this relationship was not observed for the other soil types. Zinc ammonium phosphate and zinc phosphate (hopeite) have been shown to have a very low solubility compared with ZnCl2 or ZnSO^ (Ball and Agruss, 1930;Milani et al, 2010). Soluble Zn coated onto MAP is known to react with the P in the fertilizer to form zinc ammo- Table 2.…”

Section: Discussionmentioning

confidence: 99%

Dry Soil Reduces Fertilizer Phosphorus and Zinc Diffusion but Not Bioavailability

McBeath

McLaughlin

Kirby

et al. 2012

Soil Science Society of America Journal

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Section: Discussionmentioning

confidence: 99%

Dry Soil Reduces Fertilizer Phosphorus and Zinc Diffusion but Not Bioavailability

McBeath

McLaughlin

Kirby

et al. 2012

Soil Science Society of America Journal

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“….98 (C-6), 29.42 (C-5), 37.50 (C-7), 8 a ), 7.56 (tm, 2 H, H-11,13), 7.66 (tm, 1 H, H-12), 7.91 (dm, 2 H, 44.76 (C-1), 46.23 (C-4), 72.03 (C-2), 108.57 (C-8), 128.76 (C-H-10,14). Ϫ 13 C NMR (75 MHz, CDCl 3 ): δ ϭ 28.43 (C-6), 29.84 11,13), 130.53 (C-10,14), 133.54 (C-12), 137.67 (C-9), 153.53 (C-3).…”

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confidence: 99%

Sulfonyl-Stabilized Allylic Norbornenyl and Norbornyl Carbanions: Structure and Stereoselectivity of Reaction with Electrophiles

Gais¹,

Gumpel

Raabe

et al. 1999

Eur. J. Org. Chem.

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The structures of the norbornenyl and norbornyl sulfones exo‐5, endo‐5 and endo‐6 have been determined experimentally, by X‐ray analysis, and theoretically by ab initio calculations (HF/6–31+G*). X‐ray crystal structure analyses of the lithiated allylic norbornenyl and norbornyl sulfones endo‐3/ent‐endo‐3·2diglyme and endo‐4/ent‐endo‐4·2diglyme revealed dimeric O–Li contact ion pairs devoid of C–Li bonds. The anions of endo‐3/ent‐endo‐3·2diglyme and endo‐4/ent‐endo‐4·2diglyme adopt both the endo conformation (C2–S) and are characterized by in the exo direction pyramidalized anionic C atoms. The degree of pyramidalization of the C2 atom of 3 is higher than that of 4. Ab initio optimizations (HF/6–31+G*) of the structures of the anions of methylenenorbornene I and methylenenorbornane II resulted in local minima featuring non‐planar C2 atoms which are pyramidalized in the exo direction in both cases, but to different degrees. In both cases cryoscopy of 3 and 4 in THF at –108.5 °C revealed approximately 1:1 mixtures of monomers and dimers. The sulfones exo‐5, endo‐5, exo‐6 and endo‐6 as well as the lithiosulfones 3 and 4 were studied by NMR spectroscopy. 1H‐NMR (400 MHz), 13C‐NMR (100 MHz) and 6Li‐NMR (44 MHz) spectroscopy of 3 and 4 at –100 °C in [D]8THF revealed in each case only one set of signals, independent of the configuration of the starting sulfones. This indicates in both cases that attainment of both the monomer‐dimer and the endo/exo equilibria of 3 and 4 is fast on the NMR time scale. According to 6Li{1H}‐ and 1H{1H}‐NOE experiments of 3 and 4 the monomeric and dimeric species endo‐3 and endo‐4, having endo anions, seem to be preferred in THF solution. Ab initio calculations of the anions of 3 and 4 resulted in structures endo‐3(–Li+), exo‐3(–Li+), endo‐4(–Li+) and exo‐4(–Li+) (HF/6–31+G*), whose atomic point charges were calculated by the method of Kollman et al. The C2 atoms of endo‐3(–Li+) and endo‐4(–Li+) are pyramidalized in the exo direction whereas the C2 atoms of exo‐3(–Li+) and exo‐4(–Li+) are pyramidalized in the endo direction. According to the calculations, the endo anions are more stable than the exo anions. There is good agreement between the optimized structures of the free anions and the experimentally determined structures of the anions of the contact ion pairs in the crystal. Reactions of 3 and 4 with DX, MeI, EtI, nPrI and nHeI occurred at the C2 atom under the selective formation of the corresponding endosulfones endo‐8a–e and endo‐9a–e, respectively, in all cases. Thus, an earlier report on the selective formation of the exosulfone exo‐9b in the reaction of 4 with MeI has to be revised. Product ratios were independent of the configuration of the starting sulfones and varied with the nature of the electrophile. Selectivities were highest in the case of the norbornyl species 4. Reaction of 3 with PhCHO occurred at the α position (C2) to afford the alcohols endo‐8f and exo‐8f (88:12) as single diastereomers and at higher temperatures at the γ position (C8), whereas reaction of ...

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A stable‐isotope methodology for measurement of soil‐applied zinc‐fertilizer recovery in durum wheat (Triticum durum)

McBeath

McLaughlin

Kirby

et al. 2013

Z. Pflanzenernähr. Bodenk.

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A growth-chamber study was used to develop a zinc stable-isotope ( 67 Zn) tracing technique to directly measure the amount of soil-applied zinc (Zn) granular fertilizer taken up by durum wheat (Triticum durum L.) in four different soil types. The 67 Zn-tracer technique was then applied under field conditions at one site to test the ability of the method to measure the crop recovery of soilapplied Zn granular fertilizer ( 67 Zn). The technique was developed by comparing plants treated with nil Zn fertilizer to natural-abundance-Zn-coated fertilizer and 67 Zn-coated fertilizer with plant parts analyzed for Zn isotopic composition using inductively coupled plasma-mass spectrometry. Zinc-fertilizer recovery under growth-chamber conditions was inversely related to the concentration of labile Zn in soils, with the plants on the most Zn-deficient soils having the greatest amount of Zn derived from the added fertilizer. Zinc derived from fertilizer ranged from 0.3% (Luvisol) to 0.6% (Solonetz) to 13% (Calcisol) and 18% (Lixisol) for soils with DTPA-extractable Zn of 3.5-0.21 mg kg -1 . Across the experiments, fertilizer recovery was measurable but very low (< 1% of added fertilizer being recovered by durum wheat). The recovery of Zn added to the Luvisol was slightly higher in the field than in the glasshouse (but all < 0.1%). Using this stableisotope technique, it was possible to directly assess the supply of soil-applied Zn fertilizers to crop plants.

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THE EFFECT OF Ph UPON THE PRECIPITATION OF ZINC AMMONIUM PHOSPHATE

Cited by 11 publications

References 0 publications

Dry Soil Reduces Fertilizer Phosphorus and Zinc Diffusion but Not Bioavailability

Dry Soil Reduces Fertilizer Phosphorus and Zinc Diffusion but Not Bioavailability

Sulfonyl-Stabilized Allylic Norbornenyl and Norbornyl Carbanions: Structure and Stereoselectivity of Reaction with Electrophiles

A stable‐isotope methodology for measurement of soil‐applied zinc‐fertilizer recovery in durum wheat (Triticum durum)

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