Structural characterisation of basic zinc O,O ′-dialkyl dithiophosphosphate and two isomeric examples of zinc monothiophosphates

Menzer, Stefan; Phillips, Julian R.; Slawin, Alexandra M. Z.; Williams, David J.; Woollins, J. Derek

doi:10.1039/b003915m

Cited by 33 publications

(20 citation statements)

References 8 publications

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“…The approach adopted involves thermal degradation of ZDDP in which temperature solely triggers chemical reactions and this route as opposed to a tribological one helps us understand the underlying mechanism in terms of the products that are formed in the presence and absence of FeF 3 . This approach has been used by several investigators in the past [8][9][10][11][12][13][14][15][16][17][18]. 31 P NMR and 19 F NMR have been principally used to identify these products.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Fluorinated ZDDP Compounds

2008

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Volatile degradation products of zinc dialkyl dithio phosphate (ZDDP) composed of phosphorus and sulfur compounds reduce the efficiency of catalytic converters resulting in harmful emissions. A unique way of reducing ZDDP level while maintaining good antiwear performance has been achieved by reacting a novel additive FeF 3 with ZDDP. The objective of this research is to examine the chemical interactions between ZDDP and FeF 3 that yield the new chemical species responsible for the improved wear performance. The approach adopted involves studies of thermal degradation products of ZDDP that are formed in presence and absence of FeF 3 . These intermediate products are responsible for the formation of protective tribofilms on the surface. Nuclear Magnetic Resonance Spectroscopy ( 31 P and 19 F) has been principally used to identify these products. Results have indicated the formation of new fluorinated phosphorus compounds formed as 'early intermediate' products in the reaction between ZDDP and FeF 3 . The chemical differences observed were used to justify the improved tribological behavior of the new fluorinated ZDDP compounds in comparison to ZDDP.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Fluorinated ZDDP Compounds

2008

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“…The structure of basic ZDDP was finally determined to be similar to beryllium acetate with a central Zn 4 O core bridged along each edge by the dialkyldithiophosphate ligand 152 The coordination chemistry of dithio-and (more recently) monothiophosphoric acid derivatives has been studied as a consequence of the commercial importance of ZDDPs. The monothio derivatives can behave as bridging ligands with the hard oxygens bonding to hard metals such as zinc, and the soft sulfur atoms coordinating softer metals such as platinum ( Figure 49).…”

Section: Phosphorus-sulfur Cagesmentioning

confidence: 99%

Sulfur: Inorganic Chemistry

Woollins¹

2005

Encyclopedia of Inorganic and Bioinorganic Chemistry

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“…Among the phosphate esters, phosphorodithioate derivatives are of interest as effective pesticides [3]. Phosphorodithioates have been the subject matter of several investigations involving various applications including antiviral compounds [4], plant growth regulators [5], inhibitors of number different enzymes [6], and as lubricants [7]. In recent years, a number of phosphorodithioates have been introduced as thionating agents [8,9].…”

Section: Introductionmentioning

confidence: 99%