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1

14N NMR studies on some azolopyridines using a differential saturation method

M Witanowski, L Stefaniak, S Szymański, Z Grabowski, G.A Webb

Journal:

Journal of Magnetic Resonance (1969)

Year:

1969

Language:

english

File:

PDF, 645 KB

english, 1969

2

Solvent induced nitrogen NMR shielding variations of some covalent isocyanates

M. Witanowski, Z. Biedrzycka, W. Sicinska, G.A. Webb

Journal:

Journal of Molecular Structure

Year:

1994

Language:

english

File:

PDF, 794 KB

english, 1994

3

Structural studies on some 1,3,5,7-tetraazabicyclo-[3.3.1]-nonane derivatives

L. Stefaniak, T. Urbanski, M. Witanowski, A.R. Farminer, G.A. Webb

Journal:

Year:

1974

Language:

english

File:

PDF, 322 KB

english, 1974

4

Über den scharfen Stoff des Wasserpfeffers Polygonum Hydropiper L

W. R. Witanowski, H. P. Krynska

Journal:

Naunyn-Schmiedeberg's Archives of Pharmacology

Year:

1933

Language:

german

File:

PDF, 737 KB

german, 1933

5

Optimization of an axial turbine for a small scale ORC waste heat recovery system

Witanowski, Å., Klonowicz, P., Lampart, P., Suchocki, T., JÄdrzejewski, Å., Zaniewski, D., Klimaszewski, P.

Journal:

Year:

2020

File:

PDF, 7.50 MB

2020

6

Research and applications of active bearings: A state-of-the-art review

BreÅkacz, Åukasz, Witanowski, Åukasz, DrosiÅska-Komor, Marta, Szewczuk-Krypa, Natalia

Journal:

Mechanical Systems and Signal Processing

Year:

2021

File:

PDF, 964 KB

2021

7

Solvent Effects on the Nitrogen NMR Shielding of 2-Methyl-2-nitrosopropane and its Azodioxy Dimer

M. Witanowski, Z. Biedrzycka, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1996

Language:

english

File:

PDF, 338 KB

english, 1996

8

Solvent-Induced Effects on the Nitrogen NMR Shieldings of Some Nitrosobenzene Systems

M. Witanowski, Z. Biedrzycka, W. Sicinska, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1997

Language:

english

File:

PDF, 260 KB

english, 1997

9

Nitro group effects on the 1J(CC) couplings in nitroalkanes

Michal Witanowski, Zenobia Biedrzycka, Karol Grela

Journal:

Magnetic Resonance in Chemistry

Year:

1998

Language:

english

File:

PDF, 184 KB

english, 1998

10

Nitrogen NMR shieldings of nitroalkanes as a structural and conformational probe

Michal Witanowski, Zenobia Biedrzycka, Karol Grela, Krystyna Wejroch

Journal:

Magnetic Resonance in Chemistry

Year:

1998

Language:

english

File:

PDF, 259 KB

english, 1998

11

Study of hydrogen bonding and solvent polarity effects on the nitrogen NMR shieldings of N,N-dimethylacetamidine

Michal Witanowski, Wanda Sicinska, Zenobia Biedrzycka, Graham A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

2000

Language:

english

File:

PDF, 148 KB

english, 2000

12

Acid–base equilibria in Mannich bases assessed by UV absorption spectroscopy

M. Przes&lt, ?tot=.5pt&gt, &lt, ?toc=Black&gt, ł&lt, ?toc&gt, &lt, ?tot&gt, awska, A. Koll, M. Witanowski

Journal:

Journal of Physical Organic Chemistry

Year:

1999

Language:

english

File:

PDF, 85 KB

english, 1999

13

Solvent effects on the nitrogen NMR shieldings of 3-methylsydnone and ab initio calculations of the shieldings including related oxazole and oxadiazole systems

Michal Witanowski, Zenobia Biedrzycka, Zbigniew Grabowski

Journal:

Magnetic Resonance in Chemistry

Year:

2000

Language:

english

File:

PDF, 99 KB

english, 2000

14

ChemInform Abstract: Kinetic Studies of the Reaction of Some Nitrosoalkanes with Nitrogen Dioxide.

B. G. GOWENLOCK, B. KING, J. PFAB, M. WITANOWSKI

Journal:

Year:

1998

File:

PDF, 27 KB

1998

15

Applications of 15N NMR to a study of tautomerism in some monocyclic azoles

E. Bojarska-Olejnik, L. Stefaniak, M. Witanowski, B. T. Hamdi, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1985

Language:

english

File:

PDF, 391 KB

english, 1985

16

15N NMR studies of the tautomeric equilibrium of some 1-hydroxybenzotriazoles

W. Schilf, L. Stefaniak, M. Witanowski, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1985

Language:

english

File:

PDF, 281 KB

english, 1985

17

A theoretical and empirical approach to solvent effects on nitrogen nuclear shielding

M. Witanowski, J. Sitkowski, S. Biernat, B. Kamienski, B. T. Hamdi, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1985

Language:

english

File:

PDF, 561 KB

english, 1985

18

An investigation of the tautomeric equilibria of some 3-hydroxyindazole derivatives by 15N NMR spectroscopy

W. Schilf, L. Stefaniak, M. Witanowski, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1985

Language:

english

File:

PDF, 257 KB

english, 1985

19

15N NMR investigation of the tautomeric equilibria of some 1,2,4-triazoles and related compounds

Elzbieta Bojarska-Olejnik, Lech Stefaniak, Michal Witanowski, Graham A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1986

Language:

english

File:

PDF, 489 KB

english, 1986

20

Medium effects on nitrogen nuclear shielding in methyl nitrate and methyl isothiocyanate assessed by the solvaton model

M. Witanowski, J. Sitkowski, S. Biernat, L. V. Sudha, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1987

Language:

english

File:

PDF, 472 KB

english, 1987

21

14N NMR nuclear shielding and the electronic structure of dibenzo[1,3a,4,6a]tetrazapentalene

M. Witanowski, J. Sitkowski, W. Sicińska, S. Biernat, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1989

Language:

english

File:

PDF, 385 KB

english, 1989

22

Effects of solute–solvent interactions on the nitrogen nuclear shieldings of some alkyl cyanides

M. Witanowski, W. Sicinska, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1989

Language:

english

File:

PDF, 520 KB

english, 1989

23

Study of solvent effects on the nitrogen NMR shieldings of some indolizines

M. Witanowski, W. Sicińska, Z. Grabowski, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1990

Language:

english

File:

PDF, 528 KB

english, 1990

24

Solvent-induced variations in nitrogen NMR shieldings of tert-butyl isocyanide as a probe for solvent polarizability–polarity

Michal Witanowski, Wanda Sicinska, Graham A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1992

Language:

english

File:

PDF, 356 KB

english, 1992

25

Solvent versus substituent effects on the nitrogen NMR shielding of the nitro-group in substituted benzenes

Michal Witanowski, Wanda Sicinska, Zenobia Biedrzycka, Graham A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1993

Language:

english

File:

PDF, 359 KB

english, 1993

26

Spin—spin couplings between 13C nuclei in five-membered heteroaromatic ring systems

Michal Witanowski, Zenobia Biedrzycka

Journal:

Magnetic Resonance in Chemistry

Year:

1994

Language:

english

File:

PDF, 421 KB

english, 1994

27

Nitrogen NMR assessment of interactions between nitroso, cyano and acetyl groups across aliphatic systems

Michal Witanowski, Zenobia Biedrzycka, Leszek Konopski, Karol Grela

Journal:

Magnetic Resonance in Chemistry

Year:

1995

Language:

english

File:

PDF, 490 KB

english, 1995

28

Calculation of the diamagnetic component of the nuclear screening constant for C, N, O and F

K. A. K. Ebraheem, G. A. Webb, M. Witanowski

Journal:

Magnetic Resonance in Chemistry

Year:

1976

Language:

english

File:

PDF, 299 KB

english, 1976

29

Iterative least-squares analysis of dynamic n.m.r. spectra. Hindered rotation of the N-nitroso group in N-nitroso-N-cyanomethylmethylamine

S. Szymański, L. Stefaniak, M. Witanowski, A. Ejchart

Journal:

Magnetic Resonance in Chemistry

Year:

1977

Language:

english

File:

PDF, 329 KB

english, 1977

30

Calculation of the nitrogen screening constants of some N-heterocycles

K. A. K. Ebraheem, G. A. Webb, M. Witanowski

Journal:

Magnetic Resonance in Chemistry

Year:

1978

Language:

english

File:

PDF, 316 KB

english, 1978

31

Some calculations of the local diamagnetic contribution to nuclear screening constants

M. Jallali-Heravi, G. A. Webb, M. Witanowski

Journal:

Magnetic Resonance in Chemistry

Year:

1979

Language:

english

File:

PDF, 447 KB

english, 1979

32

Nitrogen NMR sudies of some 15N labelled sydnones and related stuctures

L. Stefaniak, M. Witanowski, B. Kamieński, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1980

Language:

english

File:

PDF, 213 KB

english, 1980

33

Localization of N-oxide groups by means of nitrogen chemical shifts

M. Witanowski, L. Stefaniak, B. Kamieński, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1980

Language:

english

File:

PDF, 224 KB

english, 1980

34

Nitrogen and carbon NMR of some benzofuroxans

M. Witanowski, L. Stefaniak, S. Biernat, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1980

Language:

english

File:

PDF, 295 KB

english, 1980

35

14N NMR studies on some N-sulphinylamines

W. Sicińska, L. Stefaniak, M. Witanowski, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1981

Language:

english

File:

PDF, 238 KB

english, 1981

36

Solvent effects on the nitrogen screening of some nitroalkanes

M. Witanowski, L. Stefaniak, B. Na Lamphun, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1981

Language:

english

File:

PDF, 276 KB

english, 1981

37

The assignment of signals in the nitrogen NMR spectra of polycyclic diazines

M. Witanowski, L. Stefaniak, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1981

Language:

english

File:

PDF, 237 KB

english, 1981

38

15N NMR spectroscopy of some azines

L. Stefaniak, John D. Roberts, M. Witanowski, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1984

Language:

english

File:

PDF, 451 KB

english, 1984

39

A 15N NMR investigation of some azolopyridines

L. Stefaniak, John D. Roberts, M. Witanowski, B. T. Hamdi, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1984

Language:

english

File:

PDF, 421 KB

english, 1984

40

A 15N NMR study of some azoles

L. Stefaniak, John D. Roberts, M. Witanowski, G. A. Webb

Journal:

Magnetic Resonance in Chemistry

Year:

1984

Language:

english

File:

PDF, 334 KB

english, 1984

41

Some INDO/SSOS calculations of the effects of hydrogen bonding on the nitrogen shielding of some heterocycles

B. Na Lamphun, G. A. Webb, M. Witanowski

Journal:

Magnetic Resonance in Chemistry

Year:

1983

Language:

english

File:

PDF, 279 KB

english, 1983

42

Pyrrole and N-Methylpyrrole as Models for Solvent Polarity and Solute-to-Solvent Hydrogen-Bonding Effects on Nitrogen NMR Shielding

M. Witanowski, W. Sicinska, Z. Grabowski, G.A. Webb

Journal:

Journal of Magnetic Resonance, Series A

Year:

1993

File:

PDF, 434 KB

1993

43

A Study of Solvent Effects on the NMR Shieldings of the Two Types of Nitrogen Atoms Contained in Diazole Ring Systems

M. Witanowski, W. Sicinska, Z. Biedrzycka, G.A. Webb

Journal:

Journal of Magnetic Resonance, Series A

Year:

1994

File:

PDF, 289 KB

1994

44

Assessment of Solvent-Induced Nitrogen Shielding Variations of Triazole Systems

M. Witanowski, W. Sicinska, Z. Biedrzycka, Z. Grabowski, G.A. Webb

Journal:

Journal of Magnetic Resonance, Series A

Year:

1995

File:

PDF, 419 KB

1995

45

Solvent Effects on the Nitrogen NMR Shieldings in Oxazole and Oxadiazole Systems

M. Witanowski, Z. Biedrzycka, W. Sicinska, Z. Grabowski, G.A. Webb

Journal:

Journal of Magnetic Resonance, Series A

Year:

1996

Language:

english

File:

PDF, 117 KB

english, 1996

46

Hydrogen Bonding and Solvent Polarity Effects on the Nitrogen NMR Shielding of 1,2,4,5-Tetrazine

M. Witanowski, Z. Biedrzycka, W. Sicinska, Z. Grabowski, G.A. Webb

Journal:

Journal of Magnetic Resonance

Year:

1997

Language:

english

File:

PDF, 96 KB

english, 1997

47

A Study of Solvent Polarity and Hydrogen Bonding Effects on the Nitrogen NMR Shielding of Isomeric Tetrazoles andab InitioCalculation of the Nitrogen Shielding of Azole Systems

M. Witanowski, Z. Biedrzycka, W. Sicinska, Z. Grabowski

Journal:

Journal of Magnetic Resonance

Year:

1998

Language:

english

File:

PDF, 136 KB

english, 1998

48

Nitrogen NMR chemical shifts of some simple azines interpreted by INDO molecular orbital calculations

M Witanowski, L Stefaniak, H Januszewski, G.A Webb

Journal:

Journal of Magnetic Resonance (1969)

Year:

1969

Language:

english

File:

PDF, 350 KB

english, 1969

49

External neat nitromethane scale for nitrogen chemical shifts

M Witanowski, L Stefaniak, S Szymański, H Januszewski

Journal:

Journal of Magnetic Resonance (1969)

Year:

1969

Language:

english

File:

PDF, 734 KB

english, 1969

50

Nitrogen-14 NMR linewidths as an aid in nitrogen chemical shift assignments

M Witanowski, L Stefaniak, G.A Webb

Journal:

Journal of Magnetic Resonance (1969)

Year:

1969

Language:

english

File:

PDF, 733 KB

english, 1969

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