Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
C-13- and P-31-NMR study of tetracarbonylbis(diphenylphosphino)alkanemetal(0) complexes of the group 6 elements
Date
1999-01-01
Author
Ozer, Z
Özkar, Saim
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
156
views
0
downloads
Cite This
Tetracarbonylbis(diphenylphosphino)alkanemetal(0) complexes of the general formula M(CO)(4)[(C-6 H-5)(2) P (CH2)(n) P(C6H5)(2)] (M: Cr, Mo, W; n: 1, 2, 3) were synthesized from the reaction of M(CO)(4) (eta(2:2)-1,5-cyclooctadiene) with the appropriate ligand and characterized by means of IR and NMR (C-13 and P-31) spectroscopy Spectroscopic data shows that two phosphorus atoms in the complexes are identical and occupy two cis-coordiantion sites in a pseudo-octahedral coordination sphere of the metal. The comparative study of the coordination shift and the P-31-C-13 coupling constant reveals that two carbonyl groups trans to one of two phosphorus atoms in the diphosphine ligand are shifted toward the lower magnetic field more than those which are cis to both phosphorus atoms. This is ascribed to the fact that two multiface ligands such as carbonyl or phosphine compete for the use of metal d(pi)-orbitals more strongly when they are trans to each other.
Subject Keywords
Chromium
,
Molybdenum
,
Tungsten
,
Carbonyl
,
Diphosphine
,
NMR
URI
https://hdl.handle.net/11511/55201
Journal
TURKISH JOURNAL OF CHEMISTRY
Collections
Department of Chemistry, Article
Suggestions
OpenMETU
Core
13C- and 31P-NMR study of tetracarbonylbis(diphenylphosphino)alkanemetal(0) complexes of the group 6 elements
Özer, Zahide; Özkar, Saim (1999-12-01)
Tetracarbonylbis(diphenylphosphino)alkanemetal(0) complexes of the general formula M(CO)4[(C6 H5)2P (CH2)n P(C6H5)2] (M: Cr, Mo, W; n: 1, 2, 3) were synthesized from the reaction of M(CO)4(η2:2 -1,5-cyclooctadiene) with the appropriate ligand and characterized by means of IR and NMR (13 C and 31P) spectroscopy. Spectroscopic data shows that two phosphorus atoms in the complexes are identical and occupy two cis-coordiantion sites in a pseudo-octahedral coordination sphere of the metal. The comparative study ...
Mericarp micromorphology and anatomy of Salvia hedgeana Donmez, S. huberi Hedge and S. rosifolia Sm. (section Salvia Hedge, Lamiaceae)
BÜYÜKKARTAL, HATİCE NURHAN; Kahraman, Ahmet; ÇÖLGEÇEN, HATİCE; Doğan, Musa; KARABACAK, ERSİN (2011-04-01)
Mericarp (nutlet) micromorphology and pericarp structure of three morphologically similar endemic Salvia species; Salvia hedgeana, S. huberi and S. rosifolia were investigated using LM, SEM and TEM. Salvia hedgeana has larger mericarps and abscission scars than S. huberi and S. rosifolia. Mericarp length to width ratio ranges from 1.11 in S. hedgeana to 1.60 in S. huberi. Mericarp shape is mainly ovoid, rarely broadly ovoid in S. hedgeana, and oblong in S. huberi. The mericarp surface sculpturing pattern in...
Illitization of Late Devonian-Early Carboniferous K-bentonites from Western Pontides, NW Turkey: Implications for their origin and age
BOZKAYA, ÖMER; Günal Türkmenoğlu, Asuman; Göncüoğlu, Mehmet Cemal; Unluce, Ozge; Yılmaz, İsmail Ömer; Schroeder, Paul A. (2016-12-01)
K-bentonite (tephra) layers are exposed as thin beds within Late Devonian-Early Carboniferous carbonates of the Yilanh formation at four different locations in northwestern, Turkey. Clays separated from K-bentonites in the Gavurpman, Yilanh Burnu (Barth) and Cimsir Cukurlari (Sapca) quarries and the highway tunnel section near Zonguldak were analyzed by X-ray diffraction, optical, scanning and high-resolution transmission electron microscopy and inductively coupled plasma-mass spectrometry. The clay mineral...
Seasonal variability of the Caspian Sea three-dimensional circulation, sea level and air-sea interaction
Ibrayev, R. A; Ozsoy, E; Schrum, C.; Sur, H. I. (Copernicus GmbH, 2010-3-3)
<jats:p>Abstract. A three-dimensional primitive equation model including sea ice thermodynamics and air-sea interaction is used to study seasonal circulation and water mass variability in the Caspian Sea under the influence of realistic mass, momentum and heat fluxes. River discharges, precipitation, radiation and wind stress are seasonally specified in the model, based on available data sets. The evaporation rate, sensible and latent heat fluxes at the sea surface are computed interactively through an atmo...
Beta-casein A1/A2, kappa-casein and beta-lactoglobulin polymorphisms in Turkish cattle breeds
Dinc, H.; Ozkan, E.; Koban, E.; Togan, I. (Copernicus GmbH, 2013-10-10)
<jats:p>Abstract. In this study, the genetic diversity of three milk protein genes namely beta-casein, kappacasein and beta-lactoglobulin was estimated in Turkish cattle breeds. Based on these genes, breeds in Turkey have been grouped as: 1) Eastern Anatolian Red, Anatolian Black and Southern Anatolian Red and 2) Turkish Grey, Turkish Holstein and Holstein Candidate Bulls. B alleles of the three studied genes, which were reported to be positively related with cheese yield and quality, seemed to be low-inter...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
Z. Ozer and S. Özkar, “C-13- and P-31-NMR study of tetracarbonylbis(diphenylphosphino)alkanemetal(0) complexes of the group 6 elements,”
TURKISH JOURNAL OF CHEMISTRY
, pp. 9–14, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55201.