13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements

ÖZER, Zahide; ÖZKAR, Saim

13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements

Zahide ÖZER, (Orta Doğu Teknik Üniversitesi, Kimya Bölümü, Ankara, Türkiye)

Saim ÖZKAR (Girilmedi)

Turkish Journal of Chemistry

0 0

Yıl: 1999 Cilt: 23 Sayı: 1 Sayfa Aralığı: 9 - 14 Metin Dili: İngilizce İndeks Tarihi: 29-07-2022

13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements

Öz:

Tetracarbonylbis(diphenylphosphino)alkanemetal(0) complexes of the general formula $M(CO)_4[(C_6H_5)_2P (CH_2)_nP(C_6H_5)_2]$ (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 (13C 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 of the coordination shift and the 31P-13C 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 $dpi$-orbitals more strongly when they are trans to each other.

Anahtar Kelime:

Konular: Mühendislik, Kimya

Belge Türü: Makale Makale Türü: Diğer Erişim Türü: Erişime Açık

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APA	ÖZER Z, ÖZKAR S (1999). 13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements. , 9 - 14.
Chicago	ÖZER Zahide,ÖZKAR Saim 13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements. (1999): 9 - 14.
MLA	ÖZER Zahide,ÖZKAR Saim 13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements. , 1999, ss.9 - 14.
AMA	ÖZER Z,ÖZKAR S 13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements. . 1999; 9 - 14.
Vancouver	ÖZER Z,ÖZKAR S 13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements. . 1999; 9 - 14.
IEEE	ÖZER Z,ÖZKAR S "13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements." , ss.9 - 14, 1999.
ISNAD	ÖZER, Zahide - ÖZKAR, Saim. "13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements". (1999), 9-14.

APA	ÖZER Z, ÖZKAR S (1999). 13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements. Turkish Journal of Chemistry, 23(1), 9 - 14.
Chicago	ÖZER Zahide,ÖZKAR Saim 13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements. Turkish Journal of Chemistry 23, no.1 (1999): 9 - 14.
MLA	ÖZER Zahide,ÖZKAR Saim 13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements. Turkish Journal of Chemistry, vol.23, no.1, 1999, ss.9 - 14.
AMA	ÖZER Z,ÖZKAR S 13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements. Turkish Journal of Chemistry. 1999; 23(1): 9 - 14.
Vancouver	ÖZER Z,ÖZKAR S 13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements. Turkish Journal of Chemistry. 1999; 23(1): 9 - 14.
IEEE	ÖZER Z,ÖZKAR S "13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements." Turkish Journal of Chemistry, 23, ss.9 - 14, 1999.
ISNAD	ÖZER, Zahide - ÖZKAR, Saim. "13 C-and 31p-NMR study of tetracarbonylbis (diphenylphosphino) alkanemetal (0) complexes of the group 6 elements". Turkish Journal of Chemistry 23/1 (1999), 9-14.