Hexakis(urea-<i>O</i>)magnesium Dichlorate

Тодоров, Т.; Petrova, Rosica; Titorenkova, Rositsa; Macicek, J.; Angelova, O.

doi:10.1107/s0108270197018167

Cited by 8 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The type of coordination of the urea molecules can be described with respect to the C~----O bond directions. The values for Mg--O--C angles [between 131.7(2)and 143.8(2) °] are similar to those cited by Todorov et al (1998b) for the orientation of non-bridging urea molecules in other adducts. The NI---C---O--Mg torsion angles, which are a measure of the deviation of Mg--O bonds from the plane of the urea molecule, are between -5.1 (5) and -30.5 (5) ° .…”

Section: Commentsupporting

confidence: 82%

“…Numerous attempts to isolate this latter compound, as well as adducts with other sulfateurea ratios, have been unsuccessful. Our interest in adducts from the MgSO4-urea-H20 system was prompted by their presence as by-products during the development of a novel method for the synthesis of the well known defoliant Mg(C103)z.6urea, from MgSO4, NaCIO3 and urea (Todorov et al, 1998b), which improves its purity and activity. This paper reports the crystal structure of the new adduct, MgSO4.-6CH4N20.0.5H20.…”

Section: Commentmentioning

confidence: 99%

See 1 more Smart Citation

Magnesium Sulfate Hexaurea Hemihydrate

Тодоров¹,

Petrova²,

Titorenkova³

et al. 1998

Acta Crystallogr C

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Commentsupporting

confidence: 82%

Section: Commentmentioning

confidence: 99%

Magnesium Sulfate Hexaurea Hemihydrate

Тодоров¹,

Petrova²,

Titorenkova³

et al. 1998

Acta Crystallogr C

Self Cite

View full text Add to dashboard Cite

show abstract

“…Complexes of urea with various magnesium salts are known. The crystal structures have been determined: nitrate [19], [20], chlorate [21], tetrafluoroborate [19], sulfate [22], [23], [32], chloride [19], bromide [24], [25], iodide [26], perrenate [27], formate [28] and dihydrogen phosphate [29].…”

Section: Results and Discusionmentioning

confidence: 99%

Environmentally Acceptable Synthesis of Magnesium Bearing Fertilizers. Iii Solid State Synthesis

Velyanova,

Kossev

2024

ETR

View full text Add to dashboard Cite

Nutrition is a key factor in human life and the development of civilization. The production of sufficient food requires the use of: efficient agricultural techniques, suitable soils and the use of nitrogen (N) fertilizers. However, the use of synthetic nitrogen fertilisers is associated with significant problems, caused by the fact that they are not sufficiently retained in soils to be taken up by plants and a significant proportion of the applied fixed nitrogen is lost. This is a serious economic problem for the farmers and a serious environmental problem for the society. In this work, the known methods for reducing the loss of bound nitrogen when fertilizer formulations are applied to the soil are discussed, and a promising preparation is presented, which is a complex of urea with magnesium sulfate, named magnesium sulfate hexaureate hemi hydrate, [Mg ((H2N)2CO)6] SO41/2 H2O, which can find application both alone and in the formulation of the complex fertilizer formulations, as well as a convenient method for its preparation. The use of [Mg ((H2N)2CO)6] SO41/2 H2O, instead of conventional nitrogen fertilisers, besides the reduction of losses of fixed nitrogen, is that it supplies the soil with the trace elements Mg and S. The low hygroscopicity and the good stability of the preparation are also essential. The known ureate complexes of magnesium sulphate and their preparation are discussed. The proposed new method of solid-phase synthesis, has certain advantages. The use of solid synthesis state methods has a number of advantages: solvent-free synthesis, low-temperature operation, high yields, and the absence of by-products make these methods the most environmentally acceptable.

show abstract

“…One of the common amide ligands in nature is urea (OC(NH 2 ) 2 ), which forms compounds with many of the magnesium salts. In such compounds, urea moieties displace water molecules from the magnesium coordination surrounding, thereby reducing the hygroscopicity of such salts as magnesium chlorides, iodides, bromides, nitrates, tetrafluoroborates, chlorates, formats, dihydrogen phosphates and perrhenates [10][11][12][13][14][15][16][17][18][19][20]. Urea complexes of magnesium sulfate have been studied since the beginning of the last century.…”

Section: Introductionmentioning

confidence: 99%

New Data on Crystal Phases in the System MgSO4–OC(NH2)2–H2O

Nikolova,

Kostov-Kytin,

Petrova

et al. 2024

Crystals

View full text Add to dashboard Cite

Urea complexes of magnesium sulfate have been intensively studied due to their application in many areas of life, including agricultural chemistry, pharmacy, medicine, etc. The aim of this study is to add new knowledge about the trends and consistencies in the preparation procedures of MgSO4·nOC(NH2)2·mH2O phases. A set of analytical methods was used to characterize their structure, thermal and spectroscopic properties. The conditions for obtaining the three complexes in pure form were specified and the crystal structures of MgSO4·OC(NH2)2·2H2O and MgSO4·OC(NH2)2·3H2O were determined. The spectroscopic data of the considered compounds were analysed with respect to their structural and chemical properties. Thermal analyses showed that both the melting point and the urea decomposition temperature depend on the OC(NH2)2: H2O ratio in the octahedral environment of the magnesium ion in the studied structures.

show abstract

Hexakis(urea-O)magnesium Dichlorate

Cited by 8 publications

References 0 publications

Magnesium Sulfate Hexaurea Hemihydrate

Magnesium Sulfate Hexaurea Hemihydrate

Environmentally Acceptable Synthesis of Magnesium Bearing Fertilizers. Iii Solid State Synthesis

New Data on Crystal Phases in the System MgSO4–OC(NH2)2–H2O

Contact Info

Product

Resources

About