13C Nuclear Magnetic Resonance Studies of Organometallic Compounds. IV. cis-Dimethylplatinum(II) Derivatives

Data derived from the 13C n.m.r. spectra of seven neutral cis-dimethylplatinum(II) derivatives of the type cis-(CH3)2PtL2 and cis-(CH3)2Pt(L—L) (where L and L—L are neutral donors) are discussed and compared with data derived from the 1H n.m.r. spectra of the complexes. Simultaneous variations in L or L—L reveal that the n.m.r. trans-influence rather than the n.m.r. cis-influence is dominant. The suggestion that the n.m.r. cis- and trans-influences may be additive is discussed. In contrast with data obtained by other workers, it is shown that the 1JCH values of the platinum methyl groups are essentially insensitive to variations in the remaining ligands.

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13C Nuclear Magnetic Resonance Studies of Organometallic Compounds. V. Di- and Trimethylplatinum(IV) Derivatives

Canadian Journal of Chemistry ◽

10.1139/v74-284 ◽

1974 ◽

Vol 52 (10) ◽

pp. 1973-1982 ◽

Cited By ~ 14

Author(s):

Howard Charles Clark ◽

Leo Ernest Manzer ◽

John Edward Henry Ward

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Organometallic Compounds ◽

Methyl Groups ◽

Magnetic Resonance Studies ◽

13C Nuclear Magnetic Resonance ◽

Cis And Trans ◽

Nuclear Magnetic

The 13C n.m.r. parameters for thirteen di- and trimethylplatinum(IV) derivatives have been obtained. It is shown that the 13C shieldings and 1JPtC and 2JPtCH values of methyl groups both cis and trans to varied ligands consistently follow trends similar to those found for related methylplatinum(II) derivatives.

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13C Nuclear Magnetic Resonance Studies of Organometallic Compounds. III. cis-Methylplatinum(II) Derivatives

Canadian Journal of Chemistry ◽

10.1139/v74-089 ◽

1974 ◽

Vol 52 (4) ◽

pp. 570-578 ◽

Cited By ~ 21

Author(s):

H. C. Clark ◽

J. E. H. Ward

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Organometallic Compounds ◽

Neutral Ligand ◽

Magnetic Resonance Studies ◽

13C Nuclear Magnetic Resonance ◽

Related Series ◽

Cis And Trans ◽

Derivatives Of ◽

Nuclear Magnetic

Eight new cis-methylplatinum(II) derivatives of the type DIARSPt(CH3)X (DIARS abbreviates o-phenylenebis(dimethylarsine), where X is an anionic substituent, and [DIARSPt(CH3)L]+PF6−, where L is a neutral ligand, have been prepared. Data derived from the 13C n.m.r. spectra of these complexes are discussed and compared with data derived from the 1H n.m.r. spectra of the complexes. Comparisons with the 13C n.m.r. parameters obtained from related series of trans-methylplatinum(II) derivatives reveal marked differences between the n.m.r. cis- and trans-influences. It appears that the n.m.r. cis-influence may in part be related to a ligand's "steric bulk".

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Acyl derivatives of cyclic secondary amines. Part 2. Dynamic 1H and 13C nuclear magnetic resonance studies on bis- and tris-amides: equilibria of syn-anti interconversion

Journal of the Chemical Society Perkin Transactions 2 ◽

10.1039/p29870001701 ◽

1987 ◽

pp. 1701 ◽

Cited By ~ 4

Author(s):

Alan R. Katritzky ◽

Ramiah Murugan ◽

Hudson Luce ◽

Ban Chin Chen ◽

Wallace S. Brey ◽

...

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Secondary Amines ◽

Magnetic Resonance Studies ◽

13C Nuclear Magnetic Resonance ◽

Derivatives Of ◽

Acyl Derivatives ◽

Nuclear Magnetic

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Organometallic Compounds with Metal-Metal Bonds. IV. Pentacarbonylmanganese and Pentacarbonylrhenium Derivatives of Silicon, Germanium, Tin, and Lead. Preparation and Infrared and Nuclear Magnetic Resonance Studies

Inorganic Chemistry ◽

10.1021/ic50046a030 ◽

1966 ◽

Vol 5 (12) ◽

pp. 2217-2222 ◽

Cited By ~ 117

Author(s):

W. Jetz ◽

P. B. Simons ◽

J. A. J. Thompson ◽

W. A. G. Graham

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Silicon Germanium ◽

Organometallic Compounds ◽

Magnetic Resonance Studies ◽

Germanium Tin ◽

Metal Metal ◽

Metal Bonds ◽

Derivatives Of ◽

Nuclear Magnetic

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13C Nuclear Magnetic Resonance Studies. 32. The 13C Spectra of Several Norbornyl Derivatives

Canadian Journal of Chemistry ◽

10.1139/v73-431 ◽

1973 ◽

Vol 51 (17) ◽

pp. 2893-2901 ◽

Cited By ~ 52

Author(s):

J. B. Stothers ◽

C. T. Tan ◽

K. C. Teo

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Dihedral Angle ◽

Molecular Geometry ◽

Model Systems ◽

Methyl Groups ◽

Nonbonded Interactions ◽

Magnetic Resonance Studies ◽

13C Nuclear Magnetic Resonance ◽

Nuclear Magnetic

The 13C n.m.r. spectra of several norbornyl derivatives have been recorded to examine the variation of 13C shieldings with molecular geometry. Since it is well established that nonbonded interactions between vicinal carbon nuclei lead to pronounced upfield shifts, the so-called γ effects, series of methyl-substituted norbornanes, norbornenes, norbornan-2-ones (norcamphors), and norborn-5-en-2-ones were prepared as model systems having a variety of γ interactions between vicinal methyl groups. The observed shifts of these methyl carbons are considered in terms of the dihedral angle relating the vicinal nuclei. The use of specific deuteration for unequivocal signal assignments of carbons geminal and vicinal to the site of deuteration is illustrated.

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Further 13C nuclear magnetic resonance studies of glycals (1,5-anhydro-hex-1-enitols)

Australian Journal of Chemistry ◽

10.1071/ch9801037 ◽

1980 ◽

Vol 33 (5) ◽

pp. 1037 ◽

Cited By ~ 8

Author(s):

RD Guthrie ◽

RW Irvine

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Factors Affecting ◽

Magnetic Resonance Studies ◽

13C Nuclear Magnetic Resonance ◽

Derivatives Of ◽

Nuclear Magnetic

Study of 24 derivatives of D-glucal and D-allal have been used as models to test the findings of Fliszar et al. with respect to factors affecting the 13C n.m.r. shifts for saturated and unsaturated carbon atoms.

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13C Nuclear Magnetic Resonance Studies. Part 48. 13C Spectra of a Variety of Bicyclic Ketones

Canadian Journal of Chemistry ◽

10.1139/v75-187 ◽

1975 ◽

Vol 53 (9) ◽

pp. 1351-1361 ◽

Cited By ~ 64

Author(s):

S. H. Grover ◽

D. H. Marr ◽

J. B. Stothers ◽

C. T. Tan

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Important Influence ◽

Magnetic Resonance Studies ◽

Methyl Substitution ◽

13C Nuclear Magnetic Resonance ◽

Bicyclic Ketones ◽

Methyl Derivatives ◽

Derivatives Of ◽

Nuclear Magnetic

The 13C n.m.r. spectra of a series of 37 bicyclic ketones have been recorded to examine the variations in 13C shieldings with structure and with methyl substitution. Several examples of six skeletal types were included: bicyclo[4.4.0]decanones, bicyclo[4.1.0]heptanones, bicyclo-[3.1.0]hexanones, bicyclo[3.2.2]nonanones, bicyclo[3.2.1]- and -[3.3.0]octanones as well as bicyclo[2.1.1]hexan-2-one, nopinone (6,6-dimethylbicyclo[3.1.1]heptan-2-one), and two methyl derivatives of the latter. The observed trends associated with methyl substitution follow well-defined patterns and offer further support for the application of 13C shieldings as aids for stereochemical assignments especially through the well known γ effects. The variation in the shieldings of the carbonyl carbons in these systems suggested that bond eclipsing interactions have an important influence on this parameter. With this notion, the heretofore puzzling variations observed for the cycloalkanones are readily interprétable in terms of their favored conformations.

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