Über Chalkogenolate. LIV. Untersuchungen über Thioameisensäuren 2. Darstellung und Eigenschaften von Dithioformiaten

K[HCS₂] was prepared by interaction of chloroform with K₂S. Rb[HCS₂] and Cs[HCS₂] were formed by reaction of trimeric dithioformic acid with alcoholates (X-ray data see ?Inhaltsübersicht”?). The dithioformates T1[HCS₂], In[HCS₂]₃, and M[HCS₂]₂ with M = Pb, Zn, Cd, Hg, and M[HCS₂] with M = [(C₆H₅)₄P], [(C₆H₅)₄As], [(C₂H₅)₄N], (C₆H₅)₃Sn have been prepared. The prepared compounds are investigated by different methods.     

Über Chalkogenolate. 194 [1]: S-Bis(trimethylsilyl)aminoester von Dithiocarbamidsäuren 3. Kristall- und Molekülstruktur vom Methyl-und i-Propylderivat [1]

Inhaltsübersicht. Die Titelverbindungen R₂N–CS–S–N[Si(CH₃)₃]₂ mit Ii = CH₃ bzw. CH(CH₃)₂ kristallisieren orthorhombisch bzw. monoklin: Gitterkonstanten für R = CH₃ (bei ?165°C) a = 8,397(4) Å, b = 11,917(4) Å, c = 31,966 (11) Å, Pbca (Nr. 61), Z = 8. R = CH(CH₃)₂ (bei ?80°C) a =13,183(3) Å, b = 10,873(11) Å, c = 14,865(2) Å, β = 105,86(2)° P2₁/n (Nr. 14), Z = 4. Die Kristallstrukturen wurden unter Verwendung von 4227 bzw. 3 433 symmetrieunabhängigen Reflexen (gemessen bei ?165 bzw. ?80 °C) bestimmt und bis auf Zuverlässigkeitsfaktoren von R = 0,081 bzw. 0,082 verfeinert (R_w = 0,084 bzw. 0,114). Bei beiden Verbindungen ist der C₂N–CS–S–N-Teil des Moleküls nahezu planar. Zwischen dem Thiocarbonyl-S-Atom und dem N-Atom der silylierten Aminogruppe bestehen Wechselwirkungen. On Chalcogenolates. 194. S-Bis (trimethylsilyl) amino Esters of Dithiocarbamic Acids. 3. Crystal and Molecular Structure of the Methyl and i-Propyl Derivative The title compounds R₂N–CS–S–N[Si(CH₃)₃]₂ with R = CH₃ and CH(CH₃)₂, respectively, crystallize orthorhombic and monoclinic, resp.; cell dimensions and space group see “Inhaltsübersicht”. The structures of both compounds have been determined from single crystal X-ray data measured at ?165°C and ?80°C, resp., and refined to R's of 0.081 and 0.082, resp., (R_w = 0.084 and 0.114, resp.) using 4227 and 3433, resp., independent reflections. In both compounds the C₂N–CS–S–N core of the molecule is nearly plane. Between the thiocarbonyl sulfur atom and the nitrogen atom of the amino group interactions exist. In Fortführung unserer Untersuchungen [1, 2] über N, N-Dialkyldithiocarbamidsäure-S-bis(trimethylsilyl)aminoester R₂N–CS–S–N[Si(CH₃)₃]₂ haben wir die Kristall- und Molekülstrukturen der Verbindungen mit R = CH₃ und CH(CH₃)₂ bestimmt. Dabei sollte untersucht werden, welchen Einfluß sterisch anspruchsvollere Alkylgruppen (R = CH₃ → CH(CH₃)₂) auf die Molekülgeo-metrie haben. Eine strukturchemische Charakterisierung dieser Verbindungs-klasse ist bis jetzt noch nicht erfolgt; vgl. die Literaturzusammenstellung bei [3].     

Über Chalkogenolate. 196. Untersuchungen über N-(Methoxycarbimidoyl)guanidin 2. Umsetzungen mit Chlordithioameisensäureestern

On Chalcogenolates. 196. Studies on N-(Methoxycarbimidoyl)guanidine. 2. Reactions with Esters of Chlorodithioformic Acid N-(Methoxycarbimidoyl)guanidine reacts with esters of chlorodithioformic acid to produce the hitherto not known esters of N-(Methoxycarbimidoyl)guanidinedithiocarbonic acid (MCGT-R; formula see ?Inhaltsübersicht”?). By-product is the corresponding 2-amino-4-methoxy-6-alky(aryl)thio-1,3,5-triazine. MCGT-R, where R = CH₃, C₂H₅, C₆H₅, have been characterized by means of electron absorption, infrared, nuclear magnetic resonance, and mass spectra. The spectra and the related tautomeric structures of the dithioesters are discussed.     

Über Phosphorstickstoffverbindungen. XXXIII. Reaktionen von Diphenyltrichlorphosphoran mit Hydraziniumsalzen und -derivaten

Hydrazinium monochloride disproportionates on interaction with diphenyl-trichlorophosphorane, giving N₂ and [(C₆H₅)₂P(Cl)? N? PCl(C₆H₅)₂]Cl. The phosphinazine dihydrochloride [(C₆H₅)₂PCl? NH? NH? PCl(C₆H₅)₂]Cl₂ is obtained according to equation (4). The preparation of the P? N five-ring compound X, formulated in ?Inhaltsübersicht”?, is described.     

Über Chalkogenolate. LVII. Untersuchungen über Thioameisensäuren 5. Darstellung und Eigenschaften von Estern der Dithioameisensäure

Esters of the trimeric dithioformic acid [HCS(SR)]₃ were prepared by interaction of K[HCS₂] with alkyl iodides (R = CH₃, C₂H₅). Orthoesters HC(SR)₃ and di-orthoesters of the monomeric dithioformic acid were formed by reaction of formic acid with thioles (RSH mit R = CH₃, C₂H₅, CH₂C₆H₅) or dithioles (HS? (CH₂)_n? SH with n = 2, 3,4). The prepared compound were characterised by different methods.     

Template-Reaktion von Bis(acetylacetonato)-dioxo-molybdän(VI) mit Benzoylhydrazin und Triphenylphosphan

Template Reactions of Bis(acetylacetonato)-dioxo-molybdenum(VI) with Benzoylhydrazine and Triphenylphosphane By reaction of MoO₂(acac)₂ with C₆H₅? CO? NH? NH₂ in the presence of P(C₆H₅)₃ Mo(NNCOC₆H₅)((CH₃)₂CNNCOC₆H₅)(P(C₆H₅)) was obtained besides MoO(acac-NNHCOC₆H₅)(NNHCOC₆H₅). The earlier compound was characterized by X-ray structural analysis. Crystallographic data see ?Inhaltsübersicht”?.     

Darstellung von Tetracarbonyl-triphenylphosphinmanganorganoplumbanen R4−nPb[Mn(CO)4P(C6H5)3]n (RCH3, C6H5; n = 1,2)

Preparation of R_4?nPb[Mn(CO)₄P(C₆H₅)₃]_n Compounds (R?CH₃, C₆H₅; n = 1, 2) As the first examples of organolead manganese carbonyls substituted in the manganese carbonyl ligand compounds of the type R_4?nPb[Mn(CO)₄P(C₆H₅)₃]_n (R?CH₃, C₆H₅; n = 1, 2) have been prepared by the alkali salt method from R_4?nPbCl_n and NaMn(CO)₄P(C₆H₅)₃. (C₆H₅)₂Sn[Mn(CO)₄P(C₆H₅)₃]₂ has been gained by the same method and also by thermal ligand exchange. According the IR data the ligand P(C₆H₅)₃ is trans to the tetrahedrally surrounded lead. In solution to compounds are monomeric.     

Metallkomplexe mit biologisch wichtigen Liganden. CLVII [1] Halbsandwich‐Komplexe mit Isocyanoacetylaminosäureestern und Isocyanoacetyldi‐ und tripeptidestern („Isocyano‐Peptide”︁)

Metal Complexes of Biologically Important Ligands, CLVII [1] Halfsandwich Complexes of Isocyanoacetylamino acid esters and of Isocyanoacetyldi‐ and tripeptide esters (?Isocyanopeptides”?) N‐Isocyanoacetyl‐amino acid esters CNCH₂C(O) NHCH(R)CO₂CH₃ (R = CH₃, CH(CH₃)₂, CH₂CH(CH₃)₂, CH₂C₆H₅) and N‐isocyanoacetyl‐di‐ and tripeptide esters CNCH₂C(O)NHCH(R¹)C(O)NHCH(R²)CO₂C₂H₅ and CNCH₂C(O)NHCH(R¹)C(O)NHCH (R²)C(O)NHCH(R³)CO₂CH₃ (R¹ = R² = R³ = CH₂C₆H₅, R² = H, CH₂C₆H₅) are available by condensation of potassium isocyanoacetate with amino acid esters or peptide esters. These isocyanides form with chloro‐bridged complexes [(arene)M(Cl)(μ‐Cl)]₂ (arene = Cp*, p‐cymene, M = Ir, Rh, Ru) in the presence of Ag[BF₄] or Ag[CF₃SO₃] the cationic halfsandwich complexes [(arene)M(isocyanide)₃]⁺X^? (X = BF₄, CF₃SO₃).     

Über Chalkogenolate. 81. Untersuchungen über N-Hydroxydithiocarbamidsäure 3. Ester der N-Hydroxydithiocarbimidsäure und -carbamidsäure

On Chalcogenolates. 81. Studies on N-Hydroxy Dithiocarbamic Acid. 3- Esters of N-Hydroxy Dithiocarbimic Acid and Dithiocarbamic Acid The reaction between hydroxylamine, carbon disulfide, and alkyl halide leads to the corresponding ester of N-hydroxy dithiocarbimic acid HO? N?C(SR)₂ with R = CH₃, C₂H₅; R₂ = ? CH₂? CH₂? . The phenyl ester of N-hydroxy dithiocarbamic acid HO? NH? CS(SC₆H₅) has been prepared by reaction of hydroxylammonium chloride with the phenyl ester of chlorodithioformic acid. N-Methyl hydroxylammonium chloride reacts with carbon disulfide and alkyl iodide to form the corresponding ester of the dithiocarbamic acid HO? N(CH₃)? CS(SR) with R = CH₃, C₂H₅. The unstable compounds have been characterized by different methods.     

Über Phosphorstickstoff-Verbindungen XXVIII. Über Reaktionen von Cyanamid,Dicyanimid und Dicyandiamid mit PCl5

Interaction between cyanamide and PCl₅ in the mole ratio 1:3 yields the phosphazenium salt [Cl₃P?N? C(Cl)?N? PCl₃] [PCl₆]. The reaction of sodium dicyanimide and PCl₅ gives 1. 1. 3. 5-tetrachloro-1-phospha-2. 4. 6-triazine (compound B in ?Inhaltsübersicht”?). Dicyandiamide and PCl₅ (1:2) give compound C and, at milder conditions the salt-like phosphatriazine D. Solvolysis of C with formic acid or of D with sulphur dioxide yields E.     

Triorganoantimon- und Triorganobismutderivate von Carbonsäuren fünfgliedriger Heterocyclen Kristall- und Molekülstruktur von (C6H5)3Sb(O2C-2-C4H3S)2

Inhaltsübersicht. Triorganoantimon- und Triorganobismutdicarboxylate R₃M[O₂C(CH₂)ⁿ-2-C₄H₃X]₂ (M = Sb, R = CH₃, C₆H₁₁, C₆H₅, 4-CH₃OC₆H₄; M = Bi, R = C₆H₅, 4-CH₃C₆H₄; n = 0, X = O, S, NH, NCH₃. M = Sb, R = CH₃, C₆H₅; M = Bi, R = C₆H₅; n = 1, X = O, S. M = Sb, R = C₆H₁₁, n = 1, X = S; R = 4-FC₆H₄, n = 0, X = O, S, NCH₃; R = 2,4,6-(CH₃)₃C₆H₂, n = 0, X = O, S, NH) wurden durch Reaktionen von R₃Sb(OH)₂ (R = CH₃, C₆H₁₁, 2,4,6-(CH₃)₃C₆H₂), R₃SbO (R = C₆H₅, 4-CH₃OC₆H₄, 4-FC₆H₄) bzw. R₃BiCO₃ mit den entsprechenden fünfgliedrigen heterocyclischen Carbonsäuren 2-C₄H₃X(CH₂)_nCOOH dargestellt. Auf der Basis schwingungsspektroskopischer Daten wird für alle Verbindungen eine trigonal bipyramidale Umgebung vom M (zwei O-Atome von einzähnigen Carboxylatliganden in den apikalen, drei C-Atome von R in den äquatorialen Positionen) vorgeschlagen, ferner eine schwache Wechselwirkung zwischen O(=C) jeder Carboxylatgruppe und M. Die Kristallstrukturbestimmung von (C₆H₅)₃Sb(O₂C–2-C₄H₃S)₃ stützt diesen Vorschlag. Die Verbindung kristallisiert triklin [Raumgruppe P$1; a = 891,8(14), b = 1058,2(12), c = 1435,6(9) pm, α = 68,53(8), β = 85,47(9), γ = 85,99(11)°; Z = 2; d(ber.) = 1,607 Mg m^–3; V(Zelle) = 1255,6 ų; Strukturbestimmung anhand von 3947 unabhängigen Reflexen (F_o > 3σ(F²_o)), R(ungewichtet) = 0,037]. Sb bindet drei C₆H₅-Gruppen in der äquatorialen Ebene [mittlerer Abstand Sb–C: 211,1(5)pm] und zwei einzähnige Carboxylatliganden in den apikalen Positionen einer verzerrten trigonalen Bipyramide [mittlerer Abstand Sb–O: 212,0(4) pm]. Aus den relativ kurzen Sb – O(=C)-Abständen [274,4(4) und 294,9(4) pm] und aus der Aufweitung des dem O(=C)-Atom nächsten äquatorialen C–Sb–C-Winkels auf 145,9(2)° [andere C-Sb-C-Winkel: 104,4(2), 109,5(2)°] wird auf schwache Sb–O(=C)-Koordination geschlossen. Schließlich wird eine Korrelation zwischen dem (+, –)I-Effekt des Organoliganden R an M (M = Sb, Bi) und der Stärke der M–O(=C)-Koordination in den Dicarboxylaten R₃M[O₂C(CH₂)_n–2-C₄H₃X]₂ vorgeschlagen. Triorganoanümony and Triorganobismuth Derivatives of Carbonic Acids of Five-membered Heterocycles. Crystal and Molecular Structure of (C₆H₅)₃Sb(O₂C–2-C₄H₃S)₂ Triorganoantimony- and triorganobismuth dicarboxylates R₃M[O₂C(CH₂)_n–2-C₄H₃X]₂ (M = Sb, R = CH₃, C₆H₁₁, C₆H₅, 4-CH₃OC₆H₄; M = Bi, R = C₆H₅, 4-CH₃C₆H₄; n = 0, X = O, S, NH, NCH₃. M = Sb, R = CH₃, C₆H₅; M = Bi, R = C₆H₅; n = 1, X = O, S. M = Sb, R = C₆H₁₁, n = 1, X = S; R = 4-FC₆H₄, n = 0, X = O, S, NCH₃; R = 2,4,6-(CH₃)₃C₆H₂, n = 0, X = O, S, NH) have been prepared by reaction of R₃Sb(OH)₂ (R = CH₃, C₆H₁₁; 2,4,6-(CH₃)₃C₆H₂), R₃SbO (R = C₆H₅, 4-CH₃OC₆H₄, 4-FC₆H₄) or R₃BiCO₃ with the appropriate five-membered heterocyclic carboxylic acid. From vibrational data for all compounds a trigonal bipyramidal environment around M (two O atoms of unidendate carboxylate ligands in apical, three C atoms (of R) in equatorial positions) is proposed and also an additional weak interaction of O(=C) of each carboxylate group and M. The crystal structure determination of Ph₃Sb(O₂C–2-C₄H₃S)₂ gives additional prove to this proposal. It crystallizes triclinic [space group P$1; a = 891.8(14), b = 1058.2(12), c = 1435.6(9) pm, α = 68.53(8), β = 85.47(9), γ = 85.99(11)°; Z = 2; d(calc.) = 1.607 Mg m^–3; V_cell = 1255.6 ų; structure determination from 3 947 independent reflexions (F_o > 3σ(F²_o)), R(unweighted) = 0.037]. Sb is bonding to three C₆H₅ groups in the equatorial plane [mean distance Sb–C: 211.1(5) pm] and two unidentate carboxylate ligands in the apical positions of a distorted trigonal bipyramid [mean distance Sb–O: 212.0(4) pm]. From the relatively short Sb–O(=C) distances [274.4(4) and 294.9(4) pm] and from the enlarged value of the equatorial C–Sb–C angle next to the O(=C) atom [145.9(2)°; other C–Sb–C angles: 104.4(2), 109.5(2)°] additional weak Sb–O(=C) coordination is inferred. Finally a correlation between the (+, –) I-effect of the organic ligands It at M and the strength of the M–O = C interaction is suggested.     

Über Chalkogenolate. 166. Umsetzungen von Hydrazin mit Kohlenstoffdisulfid 5. Versuche zur Darstellung von Estern der 1,2-Hydrazin-bis(dithiocarbonsäuren) [1]

On Chalcogenolates. 166. Reactions of Hydrazine with Carbon Disulfide. 5. Attempts to Prepare Esters of 1,2-Hydrazine-bis(dithiocarboxylic Acids) Possible reactions to synthesize esters of 1,2-hydrazine-bis(dithiocarboxylic acids) are described:

• 1 The reaction of K₂[S₂C? NH? NH? CS₂] with H₃CI preponderantly forms 2,5-dimethylthio-1,3,4-thiadiazole Ia and a small quantity of bis(methylthio)-ketazine II (formula see ?Inhaltsübersicht”?).
• 2 Hydrazine reacts with Cl? CS? SC₂H₅ to give exclusively compound Ib
• 3 The reaction between K₂[S₂C=N? NH? CS? SCH₃] and H₃CI yields 94% compound Ia and 6% compound II
• 4 K₂[S₂C=N? NH? CS? SCH₃] reacts with C₆H₅? CH₂Br to form a mixture containing 25% dibenzyl sulfide, 15% 2,5-dibenzylthio-1,3,4-thiadiazole I e, and 60% 2-methylthio-5-benzylthio-1,3,4-thiadiazole I d

The compounds Ia , Id and II have been characterized by means of diverse spectroscopic methods. The mechanism of the formation of compounds I has been discussed.     

Über Reaktionen des P4S10 mit siliciumorganischen Verbindungen

Reactions of P₄S₁₀ with Organosilicon Compounds P₄S₁₀ ( 1 ) can be degraded with silicon-nitrogen compounds. 1 reacts with (CH₃)₃Si? N(CH₃)₂ ( 2 a ) and (CH₃)₃Si? N(C₂H₅)₂ ( 2 b ) to yield S?P[N(CH₃)₂]₂SSi(CH₃)₃ ( 3 a ) and ( 3 b ). By the reaction of 1 with [(CH₃)₃Si]₂S ( 4 ) S?P[S? Si(CH₃)₃]₃ ( 6 ) is formed in high yield. (C₆H₅PS₂)₂ ( 7 ) was used as a model to investigate the course of the reaction. This leads to C₆H₅P(S)? [N(CH₃)₂]SSi(CH₃)₃ ( 9 ) and C₆H₅P(S)[SSi(CH₃)₃]₂ ( 10 ). The reaction mechanism will be discussed. The n.m.r. data and mass spectra are reported.     

Zur Kenntnis der Chemie der Silazane. IV. Über ein Sulfurylphosphazo-silazan

Trichlorophosphazo-sulphurylchloride. Cl₃P?N? SO₂Cl, reacts with heptamethyldisilazane to yield the Si? N? P compound (I) formulated in ?Inhaltsübersicht”?. (I) reacts with PCl₅ or C₆H₅? PCl₄ forming the known 2,2,2,4,4,4-hexachloro-1,3-di-methylcyclo-diphosphazane(II), accompanied by the compound Cl₃P?N? SO₂Cl and C₆H₅? PCl₂?N? SO₂Cl, respectively, which were detected by means of ³¹P-NMR spectroscopy.     

Über sechsgliedrige Heterocyclen mit Phosphor-, Stickstoff- und Schwefelatomen im Ring

Cyclic sulphurylphosphazochloride (I: formula see ?Inhaltsübersicht”?) reacts with ammonia or methylamine forming the. tetramide(II) and (III), respectively, and with aniline or dimethylamine forming the diamide (IV) resp. (V). The synthesis of the diphenyl derivative (VI) is achieved starting from C₆H₅? PCl₄. (II) gives with PCl₅ the ionic compound (VII).     

Über verschiedene Reaktionen der CO-verbrückten Komplexe [Mo(CO)3bipy]2 und [Mo(CO)3phen]2 (bipy = 2,2′-Bipyridyl,phen = 1,10-Phenanthrolin)

The interaction of [Mo(CO)₃bipy]₂ with various monodentate ligands L (L = NH₃, pyr, P(C₆H₅)₃, P(C₆H₅)Cl₂, CN^?, SO₂) yields, according to the reaction equation in ?Inhaltsübersicht”?, mixed tricarbonyl compounds Mo(CO)₃bipyL by cleavage of the CO bridges of the dimeric starting carbonyl. Oxidation of [Mo(CO)₃D]₂ (D = bipy, phen) by means of iodine, partly in the presence of free bipy or phen, leads to the covalent and ionic, respectively, compound types [Mo^II(CO)₃DI₂]₂, [Mo^I(CO)₂DI]₂, [Mo^II(CO)₂D₂I]I and [Mo^II(CO)₂D₂I]I₃.     

Beiträge zur Chemie der Alkylverbindungen von Übergangsmetallen. XXXV. Zum Reaktionsverhalten von Tetrabenzyltitan gegenüber Lithiumalkylen

Contributions to the Chemistry of Transition Metal Alkyl Compounds. XXXV. Reactions in Tetrabenzyl Titanium/Alkyllithium Systems Organotitanium(IV) complexes of the type Li[(C₆H₅CH₂)₄TiR] (R = CH₃, C₂H₅, n-C₄H₉) were isolated from tetrabenzyl titanium and lithium alkyls at deep temperature. The reddish brown, crystalline compounds decompose between ?30 and 0°C with formation of benzyltitanates(II) which composition differs between Li₂[Ti(CH₂C₆H₅)₄] and Li[Ti(CH₂C₆H₅)₃]. From these complexes pure dibenzyl titanium can be isolated. The reaction mechanism is discussed. Experiments for isolation of a benzyl titanium(III) compound from (C₆H₅CH₂)₄Ti/RLi systems failed in all cases. Recent informations about stable tribenzyl titanium obtained from tetrabenzyl titanium and ethyl lithium could not be confirmed.     

Übergangsmetallchalkogenverbindungen. Über Tetraphenylarsonium- und Tetraphenylphosphoniumchloro- und fluorochromate(VI) und eine gravimetrische Bestimmung des Chroms als Tetraphenylarsoniumchlorochromat(VI)

The preparation, infrared spectra, electronic spectra and x-ray data of the salts (C₆H₅)₄M[CrO₃X] (M = P, As; X = Cl, F) are reported and discussed. The powder diagrams could be indexed tetragonal (for data see Inhaltsübersicht). Tetraphenylarsoniumchlorochromate may be used for a gravimetric determination of chromium because of its low solubility in water. A procedure is proposed.     

Aminomethylierung von Thiophosphorsäuredialkylester-, Phosphon- bzw. Thiophosphonsäurealkylesteramiden,Phosphon- bzw. Thiophosphonsäurediamiden und Diphenylthiophosphinsäureamid

Aminomethylation of Phosphoro-, Phosphono-, Phosphinoamidoates and -amidothioates Dialkylphosphoroamidates, alkyl-phosphonoamidates and phosphonoamidothioates react with C₂H₅O? CH₂? NR₂ and HCOH/HNR₂, respectively, as like as a N-aminomethylation forming the corresponding derivatives of the general formula R₂P(X)? NR′? CH₂? NR″₂? R = alkoxy, alkyl, aryl; R′ = H, alkyl; X = O, S; R″ = alkyl, cycloalkyl —. Under the same conditions phosphonodiamidoates and phosphonodiamidothioates yield RP(X)-[NR′? CH₂? NR″₂]₂ or RP(X)? NHR′? (NR′? CH₂? NR″₂) only. These compounds are not formed by interactions of RP(X)(NR′? CH₂OH)₂ with sec. amines. The aminomethylation of (C₆H₅)₂P(S)NH₂ gives unexceptional [(C₆H₅)₂P(S)]₂N? CH₂? NR′₂. The i.r. and ¹H-n.m.r. data of the prepared compounds, which can't be distilled mostly, are discussed.     

Über Chalkogenolate. 128. Untersuchungen über Ester der N-Cyancarbamidsäure. 1. Darstellung und Eigenschaften der Ammoniumsalze von N-Cyancarbamidsäureestern und vom N-Methyl-N-cyancarbamidsäureethylester

On Chalcogenolates. 128. Studies on Esters of N-Cyancarbamic Acid. 1. Synthesis and Properties of Ammonium Salts of N-Cyancarbamic Acid Esters and of the Ethyl Ester of N-Methyl N-Cyancarbamic Acid The reaction of NC? N(CO? OR)₂ with NH₃(g) yields NH₄[NC? N? CO? OR], where R = CH₃, C₂H₅, and C₆H₅. NH₄[NC? N? CO? OC₂H₅] reacts with H₃CI to form NC? N(CH₃)? CO? OC₂H₅. The called compounds have been studied with chemical and spectroscopic methods.