Benzylamidine complexes of platinum(II) derived by nucleophilic addition of primary and secondary amines. X-ray crystal structure of trans-[PtCl2{Z-N(H)C(NHMe)CH2Ph}2]

A series of novel cobalt bis(dicarbollide) based amidines were synthesized by the nucleophilic addition of primary and secondary amines to highly activated B-N+≡C–R triple bond of the propionitrilium derivative [8-EtC≡N-3,3′-Co(1,2-C2B9H10)(1′,2′-C2B9H11)]. The reactions with primary amines result in the formation of mixtures of E and Z isomers of amidines, whereas the reactions with secondary amines lead selectively to the E-isomers. The crystal molecular structures of E-[8-EtC(NMe2)=HN-3,3′-Co(1,2-C2B9H10)(1′,2′-C2B9H11)], E-[8-EtC(NEt2)=HN-3,3′-Co(1,2- C2B9H10)(1′,2′-C2B9H11)] and E-[8-EtC(NC5H10)=HN-3,3′-Co(1,2-C2B9H10)(1′,2′-C2B9H11)] were determined by single crystal X-ray diffraction.

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On the Reaction of ortho-Diphenoquinone Valence Isomers with Primary and Secondary Amines. X-Ray Structure Analysis of a 2,3-Dihydro-1H-azepinone and its Photochemical and Oxidative Conversion Products

Australian Journal of Chemistry ◽

10.1071/ch9791931 ◽

1979 ◽

Vol 32 (9) ◽

pp. 1931 ◽

Cited By ~ 1

Author(s):

H Becker ◽

K Gustafsson ◽

CL Raston ◽

AH White

Keyword(s):

Single Crystal ◽

Secondary Amines ◽

Reaction Products ◽

Oxidative Conversion ◽

X Ray Diffraction ◽

X Ray ◽

Primary And Secondary Amines ◽

Diffraction Structure ◽

Structure Determinations ◽

Photochemical Isomerization

Single-crystal X-ray diffraction structure determinations are reported for three reaction products and photoisomers formed from reactions between an o-diphenoquinone valence isomer and primary and secondary amines, namely: 3,5-di-t-butyl-7-(3,5-di-t-butyl-2-hydroxyphenyl)-1-methyl-2,3-dihydro-1H-azepin-2-one (8; R1 = R2 = But, R3 = Me), its photochemical isomerization product 4,6-di-t-butyl-1-(3,5-di-t-butyl-2-hydroxyphenyl)-2-methyl-2-azabicyclo[3,2,0]hept-6-en-3-one (9; R1 = R2 = But, R3 = Me) and 4',5,7-tri-t-butyl-3'-(2,2-dimethylpropionyl)-1'-methylspiro[benzofuran-3(2H)-2'- pyrrolidinel-2,5'-dione (12; R1 = R2 = But, R3 = Me).

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Coordination of 5-Methyl-3,7-diazanonane-1,5,9-triamine (L) to Rhodium(III). Crystal Structure of fac-[Rh(H2L)Cl3] Cl(ClO4).3H2O

Australian Journal of Chemistry ◽

10.1071/ch9940829 ◽

1994 ◽

Vol 47 (5) ◽

pp. 829 ◽

Cited By ~ 1

Author(s):

TW Hambley ◽

GA Lawrance ◽

M Maeder ◽

...

Keyword(s):

Crystal Structure ◽

Single Crystal ◽

Structure Determination ◽

Primary Amine ◽

Hot Water ◽

Secondary Amines ◽

Primary Amines ◽

Triclinic Space Group ◽

X Ray ◽

Shortest Distance

The branched, potentially quinquedentate , 5-methyl-3,7-diazanonane-1,5,9-triamine (1) reacts in hot water with rhodium(III) chloride to yield fac -[ Rh (H2(1))Cl3]2+. Only upon extended reflux for several weeks is coordination as a quinquedentate achieved. The fac complex was crystallized readily as a mixed chloride perchlorate trihydrate salt, in the triclinic space group Pī , a 8.666(2), b 10.319(2), c 12.558(3) Ǻ, α 94.34(2), β 98.86(2), γ 97.75(2)°, Z = 2; a single-crystal X-ray structure determination was refined to Rw 0.037 for 3703 'observed' reflections. The central primary amine and two adjacent secondary amines occupy an octahedral face, with the chloro ligands then necessarily fac also. The Rh -N distances vary, with the shortest distance to the primary amine [2.023(2)Ǻ] rather than to the secondary amines [2.066(2), 2.077(2) Ǻ], as do the Rh-Cl distances [range 2.345(1)-2.369(1)Ǻ]. The two primary amines on the chain terminals remain uncoordinated, the central facially capping unit preferring coordination first, possibly indicating a general intermediate for coordination of polydentate l igands containing this type of unit.

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Quinquedentate Coordination of 3-[(2'-Amino-ethyl)amino]-2-[(2″-aminoethyl)aminomethyl]propionic Acid (LH). Crystal Structure of trans-[Co(L)Cl][ClO4].H2O And Molecular Mechanics Examination of Isomers

Australian Journal of Chemistry ◽

10.1071/ch9940817 ◽

1994 ◽

Vol 47 (5) ◽

pp. 817 ◽

Cited By ~ 2

Author(s):

PV Bernhardt ◽

TW Hambley ◽

GA Lawrance ◽

KJ Molloy

Keyword(s):

Crystal Structure ◽

Molecular Mechanics ◽

Propionic Acid ◽

Structure Determination ◽

Strain Energy ◽

Secondary Amines ◽

Primary Amines ◽

Monoclinic Space Group ◽

X Ray ◽

Polyamino Acid

The anion (1c) of the branched polyamino acid 3-[(2′-aminoethyl)amino]-2-[(2″-aminoethyl)- aminomethyl ] propionic acid (1b) binds as a quinquedentate ligand to cobalt(III). Reaction with cobalt(II) chloride, followed by oxidation and acidification, yields exclusively one isomer of [Co(1c) Cl ]+. The complex was crystallized readily as a perchlorate monohydrate salt, in the monoclinic space group P 21/n, a 7.921(2), b 17.357(4), c 11.852(4) Ǻ, β 107.25(2)°, Z = 4; a single-crystal X-ray structure determination was refined to R 0.033 for 2099 `observed' reflections. The carboxylate and two adjacent secondary amines occupy an octahedral face, with the chloro ligand trans to the carboxylate , and the secondary amines adopt R,S stereochemistries. The Co-O distance [1.901(2) Ǻ] is at the short end of the range of cobalt- carboxylate bonds, and Co-N distances [average 1.944 Ǻ (primary amines), average 1.950 Ǻ (secondary amines)] are slightly shorter than average for Co-N bonds. The Co- Cl distance is 2.255(1) Ǻ. Molecular mechanics examination of all possible isomers and conformers of [Co(1c) Cl ]+ and of the related pentaamine 1,5,9-triamino-5-methyl-3,7-diazanonane (2) indicate a greater variation in strain energy across the range of isomers and conformers in the latter more strained system.

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TRIMETHYL ORTHOBORATE – AMINE INCLUSION COMPOUNDS

Canadian Journal of Chemistry ◽

10.1139/v62-275 ◽

1962 ◽

Vol 40 (9) ◽

pp. 1805-1815

Author(s):

D. M. Young ◽

C. D. Anderson

Keyword(s):

Vapor Pressure ◽

Inclusion Compounds ◽

Room Temperature ◽

Secondary Amines ◽

Crystalline Inclusion ◽

X Ray Diffraction ◽

Crystalline Inclusion Compounds ◽

X Ray ◽

New Class ◽

Primary And Secondary Amines

A new class of non-stoichiometric crystalline inclusion compounds has been discovered, having the general formula[Formula: see text]where 0.5 < n < 1.0 and 0 < x < 3 depending on the method of preparation and on the nature of the amine and solvent. Such compounds have been prepared with ammonia and a variety of primary and secondary amines. Among the solvents which can be incorporated into the crystals are alcohols, ketones, ethers, esters, nitriles, nitroparaffins, and hydrocarbons. Such compounds are also formed by triphenyl orthoborate, with 1.7 < n < 2.4 and 1.2 < x < 1.6.The incorporated solvent has been shown to exert a definite vapor pressure. Furthermore, many of the compounds sublime at room temperature to form large transparent crystals which also contain incorporated solvent. The mechanism probably involves dissociation, followed by reassociation on the walls of the vessel. Preliminary X-ray diffraction measurements suggest that the trimethyl orthoborate – ammonia inclusion compounds have essentially the same crystal lattice as pure trimethyl orthoborate – ammonia.

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One-pot synthesis of GABA amides via the nucleophilic addition of amines to 3,3-disubstituted cyclopropenes

Organic & Biomolecular Chemistry ◽

10.1039/c5ob01462j ◽

2015 ◽

Vol 13 (34) ◽

pp. 8993-8995 ◽

Cited By ~ 10

Author(s):

Vladimir A. Maslivetc ◽

Marina Rubina ◽

Michael Rubin

Keyword(s):

Double Bond ◽

Nucleophilic Addition ◽

Ring Opening ◽

Secondary Amines ◽

One Pot ◽

One Pot Synthesis ◽

Primary And Secondary Amines ◽

Donor Acceptor

A one-pot synthesis of various GABA amides has been demostrated, employing the nucleophilic addition of primary and secondary amines across the double bond of cyclopropene-3-carboxamides, followed by ring-opening of the resulting donor–acceptor cyclopropanes and subsequent in situ reduction of enamine intermediates.

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Selectivity of nucleophilic addition to and substitution at isothiocyanatocarbonyl group. Reactions of 4-pentinoyl- and 2-(2-propinyl)-4-pentinoyl isothiocyanate with amines and methanol

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19870995 ◽

1987 ◽

Vol 52 (4) ◽

pp. 995-1005 ◽

Cited By ~ 1

Author(s):

Peter Kutschy ◽

Pavol Kristian ◽

Milan Dzurilla ◽

Dušan Koščík ◽

Róbert Nádaskay

Keyword(s):

Nucleophilic Substitution ◽

Carbonyl Group ◽

Nucleophilic Addition ◽

Secondary Amines ◽

Primary Amines ◽

Primary And Secondary Amines ◽

Sterically Hindered

4-Pentinoyl isothiocyanate reacts with primary and secondary amines by either nucleophilic addition to N=C=S group to yield the corresponding thioureas, or a nucleophilic substitution at the carbonyl group to give 4-pentinoic acid amides. The less nucleophilic diphenylamine reacts selectively to afford the product of nucleophilic addition only. 2-(2-Propinyl)-4-pentinoyl isothiocyanate, having a sterically hindered carbonyl group, furnished with primary amines a mixture of amides and thioureas, whereas the bulkier secondary amines react selectively to form thioureas only. Both isothiocyanates afford with methanol as a nucleophile exclusively the corresponding O-methyl monothiocarbamates.

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Synthesis and Crystal Structure of (3S)-3-(1H-benzotriazol-1-yl)- and (3S)-3-benzenesulfonyl-2-[(2S)-2-(methoxymethyl)pyrrolidin-1-yl]-2,3-dihydro-1H-isoindol-1-ones

Journal of Chemical Research ◽

10.3184/0308234054323995 ◽

2005 ◽

Vol 2005 (5) ◽

pp. 319-321 ◽

Cited By ~ 3

Author(s):

Eric Deniau ◽

Axel Couture ◽

Pierre Grandclaudon ◽

Guy Nowogrocki

Keyword(s):

Crystal Structure ◽

Single Crystal ◽

Nucleophilic Addition ◽

Synthesis And Crystal Structure ◽

X Ray

Virtually diastereochemically pure 3-heterosubstituted isoindolinones have been obtained by nucleophilic addition on an N-acylhydrazonium salt generated by acidic treatment of the corresponding 3-hydroxy derivatives bearing a SMP type auxiliary and their structure has been assessed by single crystal X-ray analysis.

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A study on α-RuCl3 crystal structure by scanning tunneling microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100152124 ◽

1989 ◽

Vol 47 ◽

pp. 30-31

Author(s):

H.-J. Cantow ◽

H. Hillebrecht ◽

S. Magonov ◽

H. W. Rotter ◽

G. Thiele

Keyword(s):

Crystal Structure ◽

Density Distribution ◽

Scanning Tunneling Microscopy ◽

Electron Density ◽

Structure Determination ◽

Electron Density Distribution ◽

Scanning Tunneling ◽

Monoclinic Space Group ◽

Tunneling Microscopy ◽

X Ray

From X-ray analysis, the conclusions are drawn from averaged molecular informations. Thus, limitations are caused when analyzing systems whose symmetry is reduced due to interatomic interactions. In contrast, scanning tunneling microscopy (STM) directly images atomic scale surface electron density distribution, with a resolution up to fractions of Angstrom units. The crucial point is the correlation between the electron density distribution and the localization of individual atoms, which is reasonable in many cases. Thus, the use of STM images for crystal structure determination may be permitted. We tried to apply RuCl3 - a layered material with semiconductive properties - for such STM studies. From the X-ray analysis it has been assumed that α-form of this compound crystallizes in the monoclinic space group C2/m (AICI3 type). The chlorine atoms form an almost undistorted cubic closed package while Ru occupies 2/3 of the octahedral holes in every second layer building up a plane hexagon net (graphite net). Idealizing the arrangement of the chlorines a hexagonal symmetry would be expected. X-ray structure determination of isotypic compounds e.g. IrBr3 leads only to averaged positions of the metal atoms as there exist extended stacking faults of the metal layers.

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X-ray Crystal Structure of ?9-THC-tosylate

Planta Medica ◽

10.1055/s-2008-1075216 ◽

2008 ◽

Vol 74 (03) ◽

Author(s):

W Gul ◽

P Carvalho ◽

D Slade ◽

M Avery ◽

JR Duchek ◽

...

Keyword(s):

Crystal Structure ◽

X Ray

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