GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 11
    Electronic Resource
    Electronic Resource
    Reactivity of Schiff base rhenium(V) complexes with dimethylphenylphosphine (1981)
    Springer
    Transition metal chemistry 6 (1981), S. 360-364 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The ReOX2L(PPh3) complexes (X = Cl or Br and L =N-methylsalicylideneiminate,N-phenylsalicylideneiminate, halfN,N′-ethylenebis(salicylideneiminate) or 8-hydroxyquinolinate) react with dimethylphenylphosphine (PMe2Ph) to give ReOX2L(PMe2Ph) initially by displacement of the phosphine ligand and then the ReX2L(PMe2Ph)2 complexes with reduction of rhenium(V) to rhenium(III). The complexes were characterized by elemental analysis, magnetic susceptibility measurements and i.r. and1H n.m.r. spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00623657
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 12
    Electronic Resource
    Electronic Resource
    Reactions of rhenium nitrene (imido) complexes [Re(NR)Cl3(PR 3 ' )2] with salicylaldehyde (R = Me orp-MeC6H4; PR 3 ' = PPh3, PMePh2, PMe2Ph, PEt2Ph or PEt3). The Crystal Structure of [ReCl2 p-MeC6H4N)(CHOC6H4O)PPh3] (1984)
    Springer
    Transition metal chemistry 9 (1984), S. 299-302 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The reaction of [Re(NR)Cl3(PPh3)2] (R = Me orp-MeC6H4) with salicylaldehyde (SalH) gives rise to new rhenium nitrene (imido) complexes [Re(NR)Cl2(Sal)PPh3]. The corresponding PMe2Ph derivativescis- andtrans-[Re(NMe)Cl3(PMe2Ph)2] andtrans-[Re(NTo)Cl3(PMe2Ph)2] (To =p-MeC6H4) do not react with SalH or SalLi under the same experimental conditions. By reaction of [Re(NTo)Cl2− (Sal)PPh3] with PR3 (PR3=PMe2Ph, PEt2Ph, PEt3, or PMePh2) the complexes [Re(NTo)Cl2(CHOSal)(PR3)2] are obtained, in which the ligand is monodentate. Reaction of [Re(NTo)Cl2(CHOSal)(PMe2Ph)2] withp-toluidine, gives the Schiff base derivative [Re(NTo)Cl2(S.B.)(PMe2Ph)]. The crystal structure of the title compound was determined by x-ray crystallography. The compound is triclinic, space group PI, with a=11.698(5), b=11.445(5), c=11.725(5) Å, α= 74.12(3)°, β=102.65(3)°, γ=86.89(3)°; Dx=1.69 g cm−3 for Z=2. The structure was refined to R=0.058 for 4400 observed reflections. The rhenium atom is in a distorted octahedral coordination with the chlorine atomstrans to each other. Relevant bond lengths are: Re-Cl, 2.381(3) and 2.424(3) Å; Re-P, 2.427(3) Å; Re-O, 2,01(1) and 2.08(1) Å; Re-N, 1.72(1) Å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00618168
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 13
    Electronic Resource
    Electronic Resource
    2-Oxacyclopentylidene, 2-Oxacyclohexylidene, and 2-Oxacycloheptylidene Rhenium Complexes by Reaction of ω-Alkynols with the [{MeC(CH2PPh2)3}Re(CO)2]+ Auxiliary (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 211-219 
    Details
    ISSN: 1434-1948
    Keywords: Rhenium ; Oxacyclocarbene complexes ; Vinylidene comlexes ; Alkynols ; Tripodal ligands ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Various β-, γ-, and δ-alkynols have been reacted with the 16e- fragment [(triphos)Re(CO)2]+ generated in situ by H2 elimination from [(triphos)Re(CO)2(η2-H2)]BF4 [triphos = MeC(CH2PPh2)3]. Irrespective of the length of the alkyl chain between the C≡C and OH functional groups in the ω-alkynol, 2-oxacyclocarbene complexes are obtained. These include the 2-oxacyclopentylidene derivatives [(triphos)Re(CO)2{=CCH2CH2CH2O}]BF4 and [(triphos)Re(CO)2{=CCH2CH2CH(Me)O}]BF4, the 2-oxacyclohexylidene dervivatives [(triphos)Re(CO)2{=CCH2CH2CH2CH2O}]BF4 and[(triphos)Re(CO)2{=CCH2CH2CH2CH(Me)O}]BF4, and the 2-oxacycloheptylidene complex [(triphos)Re(CO)2{=CCH2CH2- CH2CH2CH2O}]BF4. The latter compound contains a unprecedented seven-membered oxacarbene ring. The rhenium-assisted δ-alkynol to 2-oxacyloheptylidene rearrangement proceeds via the hydroxybutylvinylidene kinetic intermediate [(triphos)Re(CO)2{C=C(H)CH2CH2CH2CH2OH}]BF4, which has been characterized in both the solid state and solution. An X-ray analysis has been carried out on a single crystal of [(triphos)Re(CO)2{=CCH2CH2CH(Me)O}]BF4. The structure of this complex consists of [(triphos)Re(CO)2{=CCH2CH2CH(Me)O}]+ cations and tetrafluoroborate anions with no interspersed solvent molecules. A facial triphos ligand, two cis-disposed carbonyl groups and a 2-oxacyclopentylidene ligand coordinate the Re centre in a slightly distorted octahedral environment.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 14
    facet.materialart.
    Unknown
    Forests, Vol. 9, Pages 257: Corsican Pine (Pinus laricio Poiret) Stand Management: Medium and Long Lasting Effects of Thinning on Biomass Growth (2018)
    MDPI Publishing
    In: Forests
    Details
    Publication Date: 2018-05-11
    Description: Forests, Vol. 9, Pages 257: Corsican Pine (Pinus laricio Poiret) Stand Management: Medium and Long Lasting Effects of Thinning on Biomass Growth Forests doi: 10.3390/f9050257 Authors: Rodolfo Picchio Rachele Venanzi Francesco Latterini Enrico Marchi Andrea Laschi Angela Lo Monaco With the aim of acquiring better comprehension of the ecological and productive aspects of the management of pine forests, we monitored logging damage and evaluated the effects of thinning on stand growth 20 years after the treatment in a Pinus laricio Poiret stand in central Italy. The objectives of the present study were to estimate the injury levels to the remaining trees after thinning; to assess logging damage in the long-term by monitoring residual trees at the end of thinning; to evaluate the effect of damage on the radial growth of trees; to assess the stand dynamics in relation to injury levels and the treatment applied in a twenty-year range; to understand a possible treatment return time; and to evaluate the existence of the “thinning shock”. The results were that 20 years after treatment, the stand dynamics showed a complete recovery; logging damage did not affect the radial growth of P. laricio over time; a second treatment seem to be sustainable starting from the fifteenth year after the previous treatment; and the thinning shock can be clearly evaluated in the first six to seven years after the treatment.
    Electronic ISSN: 1999-4907
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by MDPI Publishing
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...