Isolation of tetraphenylselenurane

Bienfait, André Marcel; Kubella, Paul; Mueller, B. G.; Seppelt, Konrad

doi:10.1002/hc.20686

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…have used (C6H5)2SeF2 as the starting material (Section 3.2) [4]. Selenium tetrachloride is, however, a convenient source of selenium(IV) for the preparation of selenium(IV) diimides RN=Se=NR by reaction with the appropriate primary amine RNH2 (R = t Bu [5] Ad [6a]) or the monolithiated primary i Pr, neo-pentyl, CF3CH2) has been prepared by the reaction of the appropriate alcohol with SeCl4 in the presence of trimethylamine; however, the R = Me or Et derivatives are thermally unstable [7].…”

Section: Binary Chalcogen-halogen Reagents 221 Selenium Tetrahalidesmentioning

confidence: 99%

2. Selenium– and tellurium–halogen reagents

Chivers¹,

Laitinen²

2019

Selenium and Tellurium Reagents

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Selenium and tellurium form binary halides in which the chalcogen can be in formal oxidation states (IV), (II) or (I). They are versatile reagents for the preparation of a wide range of inorganic and organic selenium and tellurium compounds taking advantage of the reactivity of the chalcogenhalogen bond. With the exception of the tetrafluorides, the tetrahalides are either commercially available or readily prepared. On the other hand, the low-valent species, EX2 (E = Se, Te; X = Cl, Br) and E2X2 (E = Se, Te; X = Cl, Br) are unstable with respect to disproportionation and must be used as in situ reagents. Organoselenium and tellurium halides are well-known in oxidation states (IV) and (II), as exemplified by REX3, R2EX2, and REX (R = alkyl, aryl; E = Se, Te; X = F, Cl, Br, I), as well as mixed-valent (IV/II) compounds of the type RTeX2TeR are also known. This chapter surveys the availability and/or preparative methods for these widely used reagents followed by examples of their applications in synthetic inorganic and organic selenium and tellurium chemistry. For both the binary halides and their organic derivatives the discussion is subdivided according to the formal oxidation state of the chalcogen.

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Section: Binary Chalcogen-halogen Reagents 221 Selenium Tetrahalidesmentioning

confidence: 99%

2. Selenium– and tellurium–halogen reagents

Chivers¹,

Laitinen²

2019

Selenium and Tellurium Reagents

View full text Add to dashboard Cite

show abstract

“…have used (C6H5)2SeF2 as the starting material (Section 3.2) [4]. Selenium tetrachloride is, however, a convenient source of selenium(IV) for the preparation of selenium(IV) diimides RN=Se=NR by reaction with the appropriate primary amine RNH2 (R = t Bu [5] Ad [6a]) or the monolithiated primary amine Mes*N(H)Li [6b]; the applications of RN=Se=NR reagents are discussed in Chapter 4, Section 7.1.…”

Section: Selenium Tetrahalidesmentioning

confidence: 99%

Selenium– and tellurium–halogen reagents

Chivers

Laitinen

2018

Physical Sciences Reviews

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Abstract Selenium and tellurium form binary halides in which the chalcogen can be in formal oxidation states (IV), (II) or (I). They are versatile reagents for the preparation of a wide range of inorganic and organic selenium and tellurium compounds taking advantage of the reactivity of the chalcogen–halogen bond. With the exception of the tetrafluorides, the tetrahalides are either commercially available or readily prepared. On the other hand, the low-valent species, EX2 (E = Se, Te; X = Cl, Br) and E2X2 (E = Se, Te; X = Cl, Br) are unstable with respect to disproportionation and must be used as in situ reagents. Organoselenium and tellurium halides are well-known in oxidation states (IV) and (II), as exemplified by REX3, R2EX2 and REX (R = alkyl, aryl; E = Se, Te; X = F, Cl, Br, I); mixed-valent (IV/II) compounds of the type RTeX2TeR are also known. This chapter surveys the availability and/or preparative methods for these widely used reagents followed by examples of their applications in synthetic inorganic and organic selenium and tellurium chemistry. For both the binary halides and their organic derivatives, the discussion is subdivided according to the formal oxidation state of the chalcogen.

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NMR of Organoselenium and Organotellurium Compounds

Panda

Singh

2012

Patai's Chemistry of Functional Groups

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This chapter gives a systematic account of and surveys the available data on 77 Se and 125 Te NMR spectra of organochalcogen compounds such as chacogenols, mono and dichalcogenides, chalcogenolates, tetra and hexa substituted chalcogen compounds, chalcogenyl halides, chalcogen‐containing heterocycles and macrocycles, chalcogen‐oxygen/nitrogen compounds, etc. The review is based on the literature from 1985 to 2011 and includes 780 references. The 77 Se/ 125 Te NMR spectra of organochalcogen compounds reveal expansive chemical shifts (δ Se /δ Te ) leading to sharp sensitivity of these nuclei (Se/Te) to their environment such as solvent, temperature, molecular geometry, ligand backbone, oxidation state, chelate ring size, steric strain, etc. This is well illustrated by the advantageous use of this spectroscopy in the successful determination of the solution state structure of several organochalcogen compounds. It is noted that the 125 Te and 77 Se chemical shifts of a large number of structurally similar organotellurium and selenium compounds show linear relationship.

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Isolation of tetraphenylselenurane

Cited by 4 publications

References 11 publications

2. Selenium– and tellurium–halogen reagents

2. Selenium– and tellurium–halogen reagents

Selenium– and tellurium–halogen reagents

NMR of Organoselenium and Organotellurium Compounds

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