Cyclophosphazenes

Krishnamurthy, S. S.; Sau, Arjun C.; Woods, Michael

doi:10.1016/s0065-2792(08)60278-2

Cited by 93 publications

(42 citation statements)

References 393 publications

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“…HCI the degenerate ring stretching vibration, v(P=N), is shifted to higher wavenumbers by ca. 50 cm-' compared to the free base, (Ph,PN),, as expected for protonation at a ring nitrogen atom (17).…”

Section: Reactiorz Of Sjn-with Ph2pclsupporting

confidence: 56%

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Reactions of the trisulfur trinitride anion, S₃N₃⁻, with halogens and other electrophilic substrates

Chivers¹,

Rao²

1983

Can. J. Chem.

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The reactions of the trisulfur trinitride anion, S3N3−, with halogens (Cl2, Br2, l2), AsF5, SOCl2, SO2Cl2, S2Cl2, COCl2, CS2, Me3SiCl, and Ph2PCl have been investigated. In all cases these reactions gave mixtures of known sulfur–nitrogen compounds. Thus the halogens react with S3N3−.to give mainly S4N4, S4N3+X− (X = Br, Cl), (SN)x, and S3N3X3 (X = Cl), while AsF5 oxidizes S3N3− to S4N4•AsF5. The major products of the reaction of S3N3− with SOCl2 or SO2O2 were S4N4, S4N3+Cl−, and (for SOCl2 only) S3N2O2•S3N2Cl was the main product of the reaction of S3N3− with S2Cl2, whereas COCl2 yielded (SN)x in addition to S3N2Cl and S4N4. Carbon disulfide reacts with S3N3− to give S4N2, S4N4, and CNS−. The cyclophosphathiazenes, (Ph2PN)(SN)2, 1,3- and 1,5-(Ph2PN)2(SN)2, in addition to (Ph2PN)x (x = 3, 4), (Ph2PN)3•HCl and (Ph2PN)2NSCl were isolated from the reactions of Ph2PCl with S3N3− in various molar ratios. The latter reaction represents a useful alternative synthesis of the 1,5-isomer of the eight-membered ring (Ph2PN)2(SN)2.

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Section: Reactiorz Of Sjn-with Ph2pclsupporting

confidence: 56%

“…The isolation of the adduct (Ph2PN),.HCI was unexpected since HCI adducts of cyclophosphazenes are formed readily only when the substituents on phosphorus are alkyl or dialkylamino groups (17). However, it has been suggested that the adduct (Ph2PN)3.…”

Section: Reactiorz Of Sjn-with Ph2pclmentioning

confidence: 99%

Reactions of the trisulfur trinitride anion, S₃N₃⁻, with halogens and other electrophilic substrates

Chivers¹,

Rao²

1983

Can. J. Chem.

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“…Excluding spirocyclic species, this is the first example of a geminal N 3 P 3 CI 4 (OR) 2 species formed in the reactions of nucleophiles derived frm alcohols with N3 P 3Cl 6 The non-geminal isomers both exhibit AB 2 spectra (Figure 1 is as expected, complex. In the region associated with H (-OCHa-CH there is a a a 2 )he is 21 triplet in low abundance which is slightly upfield from the H resonances for a -'PCl(OCH=CH 2 ) environment.…”

Section: Preparation Of N P C1(och-ch ) (5) and N P (Och-ch) (6)mentioning

confidence: 52%

“…The The 31 P nmr sample of 4, the tetrakis sample, again indicates the existence of all three isomers. The geminal isomer is in very low abundance and is characterized by an AX2 spectrum with A in the --PC1 2 and X in the EP(OCH-CH 2 ) region. There are two sets of closely spaced A 2 X spectra covering the -PCI(OCH-CH 2 ) 2 and -P(OCH=CH 2 ) 2 regions which correspond to the non-geminal cis and trans isomers in nearly equal amounts.…”

Section: Preparation Of N P C1(och-ch ) (5) and N P (Och-ch) (6)mentioning

confidence: 99%

(Vinyloxy)chlorocyclotriphosphazenes

Ramachandran¹,

Allen²

1983

Inorg. Chem.

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The reactions of the lithium enolate of acetaldehyde, LiOCHCH2, with hexachlorocyclotriphosphazene, N3P3C16, lead to the series of (vinyloxy)chlorocyclotriphosphazenes, N3P3Cl6_"(OCH=CH2)" (n = 1-6). Evidence for the occurrence of all possible geometrical and positional isomers in the series has been obtained from the 31P NMR spectra. The principal products are the nongeminal species with comparable amounts of cis and trans isomers being formed. Small amounts of the geminal isomers are also observed. The mono-and pentasubstituted derivatives have been converted to their dimethylamino derivatives, N3P3(OCH=CH2)6."[N(CH3)2]" (n = 1, 5).

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“…Unsere bisherigen Untersuchungen zur Frage des koordinativen Verhaltens der Chelatliganden Me2EM'Me2(CH2)nE'Me2 (E, E' -N, P, As; M' = Si, Ge; n = 1,2) [1][2][3][4] Die Bindungsbeschreibung kann wie bei den Phosphazenen [5] und Schwefel-Stickstoff-Ringen [6] auf der Basis inselförmiger ^-Orbitale erfolgen, die jeweils drei Ringatome umfassen. Eine pseudoaromatische Wechselwirkung dieser Art wird für viele anorganische Ringsysteme der allgemeinen Formel (AB)n zwischen Atomen A der ersten und Atomen B der zweiten Achterperiode des Periodensystems postuliert [7][8][9][10].…”

unclassified

Alternativ-Liganden, XIV [1]. Neue Chelatliganden des Typs (2-Me₂E′C₆H₄)Si(EMe₂)Me₂ (E, E′ = N, P, As; Me = CH₃) / Alternative Ligands, XIV [1]. Novel Chelating Ligands of the Type (2-Me₂E′C₆H₄)Si(EMe₂)Me₂ (E, E′ = N, P, As; Me = CH₃)

Aslanidis

Grobe

1983

Zeitschrift Für Naturforschung B

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Chelating ligands of the type (2-Me2NC6H4)Si(EMe2)Me2 (E = N, P, As) are prepared by ortho-lithiation of N,N-dimethylaniline followed by reaction with ClSi(NMe2)Me2 to yield (2-Me2NC6H4)Si(NMe2)Me2. Cleavage of the SiN-bond with MePCl2 affords (2-Me2NC6H4)Si(Cl)Me2, which on substitution with LiEMe2 (E = P, As) gives the corresponding ligands. Synthesis of (2-Me2E'C6H4)Si(EMe2)Me2 with E' = P or As is accomplished by producing 2-ClC6H4MgBr followed by reaction with either Me2E'Cl or ClSi(NMe2)Me2 to yield (2-ClC6H4)E'Me2 and (2-ClC6H4)Si(NMe2)Me2, respectively. The second donor group is introduced by Cl/Li exchange and reaction of the resulting lithium compounds with either ClSi(NMe2)Me2 or Me2E'Cl. (2-Me2PC6H4)Si(NMe2)Me2 and (2-Me2AsC6H4)Si(NMe2)Me2 then are used to prepare the additional four ligands with E, E' = P, As via (2-Me2E'C6H4)Si(Cl)Me2 by substitution with LiEMe2.

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Cyclophosphazenes

Cited by 93 publications

References 393 publications

Reactions of the trisulfur trinitride anion, S₃N₃⁻, with halogens and other electrophilic substrates

Reactions of the trisulfur trinitride anion, S₃N₃⁻, with halogens and other electrophilic substrates

(Vinyloxy)chlorocyclotriphosphazenes

Alternativ-Liganden, XIV [1]. Neue Chelatliganden des Typs (2-Me₂E′C₆H₄)Si(EMe₂)Me₂ (E, E′ = N, P, As; Me = CH₃) / Alternative Ligands, XIV [1]. Novel Chelating Ligands of the Type (2-Me₂E′C₆H₄)Si(EMe₂)Me₂ (E, E′ = N, P, As; Me = CH₃)

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Cyclophosphazenes

Cited by 93 publications

References 393 publications

Reactions of the trisulfur trinitride anion, S3N3−, with halogens and other electrophilic substrates

Reactions of the trisulfur trinitride anion, S3N3−, with halogens and other electrophilic substrates

(Vinyloxy)chlorocyclotriphosphazenes

Alternativ-Liganden, XIV [1]. Neue Chelatliganden des Typs (2-Me2E′C6H4)Si(EMe2)Me2 (E, E′ = N, P, As; Me = CH3) / Alternative Ligands, XIV [1]. Novel Chelating Ligands of the Type (2-Me2E′C6H4)Si(EMe2)Me2 (E, E′ = N, P, As; Me = CH3)

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Reactions of the trisulfur trinitride anion, S₃N₃⁻, with halogens and other electrophilic substrates

Reactions of the trisulfur trinitride anion, S₃N₃⁻, with halogens and other electrophilic substrates

Alternativ-Liganden, XIV [1]. Neue Chelatliganden des Typs (2-Me₂E′C₆H₄)Si(EMe₂)Me₂ (E, E′ = N, P, As; Me = CH₃) / Alternative Ligands, XIV [1]. Novel Chelating Ligands of the Type (2-Me₂E′C₆H₄)Si(EMe₂)Me₂ (E, E′ = N, P, As; Me = CH₃)