High-spin Mangan(II)-Phthalocyanine: Darstellung und spektroskopische Eigenschaften von Acidophthalocyaninatomanganat(II)

High Spin Manganese(II) Phthalocyanines: Preparation and Spectroscopical Properties of Acidophthalocyaninatomanganate(II) Acidophthalocyaninatomanaganese(III) is reduced by boranate, thioacetate or hydrogensulfide to yield acidophthalo-cyaninatomanganate(II) ([Mn(X)Pc^2?]^?; X = Cl, Br, NCO, NCS) being isolated as tetra(n-butyl)ammonium salt. In the cyclovoltammogram of [Mn(NCO)Pc^2?]^? the halv-wave potential for the redoxcouple Mn^II/Mn^III is at ?0.13 V, that of the first ring reduction at ?0.99 V. The magnetic moments are indicative of high-spin ⁶A₁ ground states: μ_Mn = 5.84 (NCO), 5.78(Cl), 5.65 (Br), 5.68 μ_B (NCS). A Curie-like temperature dependence of μ_Mn is observed in the region 300–30 K. Below 30 K an increase in μ_Mn occurs due to weak intermolecular ferromagnetic coupling. The ESR spectra confirm the S = 5/2 ground state with a strong g = 6 resonance observed (A_Mn = 80 G) as expected for an axially distorted ligand-field. Besides the typical π-π* transitions of the Pc^2?-ligand several weak bands are observed in the Uv-vis-n.i.r. spectra at ca. 7.5, 9.1, 14.0 and 19.0 kK that are assigned to trip-multiplet transitions. In resonance with the band at 19.0 kK the Mn? X stretching vibration (v(MnX)) is resonance Raman enhanced: X = NCO: 319, Cl: 286, SCN: 238, Br: 202 cm^?1. These vibrational frequencies are confirmed by the f.i.r. spectra. In the case of the thiocyanato-complex probably both forms of bonding of the ambident NCS-ligand are present (v(Mn? NCS): 274 cm^?1). The frequencies of the vibrations of the inner (CN)₈ ring are reduced by up to 20 cm^?1 as compared with those of low spin Mn^II phthalocyanines.     

Darstellung,Eigenschaften und Kristallstruktur von Bis(phthalocyaninato)cer(IV)

Preparation, Properties and Crystal Structure of Bis(phthalocyaninato)cerium(IV) The anodic or chemical oxidation with dibenzoylperoxide of solutions of bis(phthalocyaninato)cerate(III) in dichloromethane yields selectively sparely soluble bis(phthalocyaninato)cerium(IV), [Ce(Pc(2-)) 2 ]. Green, monoclinic needles cristallize with a = 18.783(12) Å b = 18.739(16) Å c= 15.618(10) Å ß114.30(7)°; Z = 4; space group C2/c. [Ce(Pc(2–)) 2 ] is a sandwich complex in which the cerium Atom is eightfold coordinated by the isoindole nitrogens of the two staggered convex Pc-rings. The u.v.-vis., m.i.r., f.i.r. and resonance Raman spectra are consistent with the structure.     

Preparation of Pseudohalidoheptasulfur(+1) Hexafluorometallates S7X+MF−6 (X = CN,OCN, SeCN; M = As,Sb)

The preparation and spectroscopic characterization of S₇X⁺MF^?₆ (X = CN, OCN, SCN, SeCN; M = As, Sb) is reported. The new compounds are formed in analogy to the preparation of halidocycloheptrasulfur(+1) cations from S²⁺₈(MF^?₆)₂ and alkali pseudohalides in So₂ as solvent. Their thermal stabilities decrease with the increasing Pearson hardness of the pseudohalide ligands.     

Etude Electrochimique et Differenciation de Derives des Dibenzodiazepines et des Dibenzothiazepines

Abstract

New psychotropic drugs like Clozapin and Clothiapin were separated and differenciated using D.C., A.C. and D.P.P. polarographic techniques. The mechanism of the electrode reaction is elucidated.     

Darstellung und spektroskopische Charakterisierung von Di(acido)phthalocyaninatorhodaten(III)

Preparation and Spectroscopical Characterization of Di(acido)phthalocyaninatorhodates(III) Triethylendiaminorhodiumiodide reacts quickly and completely with boiling phthalodinitrile precipitating ?rhodiumphthalocyanine”?, which is purified and dissolved in alkaline media as di(hydroxo)phthalocyaninatorhodate(III). Acidification in the presence of halides or pseudohalides yields less soluble acidophthalocyaninatorhodium reacting with tetra-n-butyl-ammonium(pseudo)halide to give (blue)green tetra-n-butyl-ammoniumdi(acido)phthalocyaninatorhodate(III), (ⁿBu₄N)[Rh(X)₂Pc^2?] (X = Cl, Br, I, N₃, CN, NCO, SCN, SeCN). The asym. Rh? X-stretching vibration (v_as(RhX)) is observed in the f.i.r. at 290 (X = Cl), 233 (Br), 205 (I), 366 (N₃), 347 (CN), 351 (NCO), 257 (SCN) and 214 cm^?1 (SeCN). v_s(RhI) is the only sym. Rh? X-stretching vibration excited at 131 cm^?1 in the Raman spectrum. The m.i.r. and resonance Raman spectra are typical for hexacoordinated phthalocyaninatometalates(III). The influence of the axial ligands is very small. The frequency of the stretching vibrations of the pseudohalo-ligands are as expected (in the case of the ambident ligands the bonding atom is named first): v_as(NN) at 2006 and v_s(NN) at 1270 cm^?1 (N₃); v_as(CN) at 2126 (CN), 2153 (NCO), 2110 (SCN) and 2116 cm^?1 (SeCN). The characteristic π–π*-transitions of the Pc^2?-ligand dominate the UV-vis spectra. The splitting of the Q and N region is discussed and the weak absorbance at ca. 22 kK is assigned to a n–π*-transition.     

Kurventafel zur graphischen Bestimmung von pH-Werten einwertiger S?uren und Basen

Ohne Zusammenfassung

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Diagram for graphical determination of pH-values of monovalent acids and bases

     

Etude Electrochimique d'Un Nouveau Neuroleptique: La Loxapine

Abstract

The electrochemical characteristics of loxapine have been determined using D.C., A.C. and D.P. polarography and cyclic voltamnetry. The reduction of the azomethin group is influenced by the vicinity of the protonable piperazin ring. Adsorption phenomena have been observed, especially in alkaline medium. The determination of loxapine can be easily carried out quantitatively in acidic medium, and an application of the method for the determination of loxapine in tablets has been realized. The simultaneous detection of loxapin and clothiapine, which are structurally related neuroleptics differing only by an oxygen or a sulfur atom in the central heterocycle is not possible; nevertheless, loxapine has been detected in neutral or alkaline medium in the presence of clozapine, which differs from the two precedents by the presence of a nitrogen as heteroatom.     

Struktur und Konformation hochsubstituierter Ethane

Ohne Zusammenfassung

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Structure and conformation of high-substituted ethanes

Teilw. publiziert: H.-D. Beckhaus, K. J. McCullough, H. Fritz, C. Rüchardt, B. Kitschke, H. J. Lindner, D. A. Dougherty und K. Mislow, Chem. Ber. 113, 1867 (1980) und dort zitierte Literatur     

Borchelate und Bormetallchelate, 4. Mitt.

The i.r., u. v.,¹H n.m.r.,¹³C n.m.r., and¹¹B n.m.r. spectra of several substituted diphenylboron chelates derived from salicylaldehyde azomethines were compared with respect to the influence of the amine substituentR. O–B–N-6-ring constitution of the chelates29–32 [R=OH, NH₂, NHC₆H₅, N(CH₃)₂] can be deduced from the spectra.

Als 3. Mitt. gilt:F. Umland undE. Hohaus mit Beiträgen vonW. Riepe, K. Brodte, C. Schleyerbach undD. Szonn. Untersuchungen über borhaltige Ringsysteme vom Chelattyp. Forschungsbericht des Landes Nordrhein-Westfalen Nr. 2538. Opladen: Westdeutscher Verlag. 1976.     

Darstellung,Eigenschaften und elektronische Raman-Spektren von Bis(chloro)phthalocyaninatoferrat(III), -ruthenat(III) und -osmat(III)

Preparation, Properties and Electronic Raman Spectra of Bis(chloro)-phthalocyaninatoferrate(III), -ruthenate(III) and -osmate(III) Bis(chloro)phthalocyaninatometalates of Fe^III, Ru^III and Os^III [MCl₂Pc(2-)]^?, with an electronic low spin ground state are formed by the reaction of [FeClPc(2-)] resp. H[MX₂Pc(2?)] (M = Ru, Os; X = Cl, I) with excess chloride in weakly coordinating solvents (DMF, THF) and are isolated as (n-Bu₄N) salts. The asym. M? Cl stretch (ν_as(MCl)) is observed in the f.i.r. at 288 cm^?1 (Fe), 295 cm^?1 (Ru), 298 cm^?1 (Os), ν_as(MN) at 330 cm^?1 (Fe), 327 cm^?1 (Ru), and 317 cm^?1 (Os); only ν_s(OsCl) at 311 cm^?1 is resonance Raman (r.r.) enhanced with blue excitation. The m.i.r. and FT-Raman spectra are typical for hexacoordinated phthalocyanines of tervalent metal ions. The UV-vis spectra show besides the characteristic π-π* transitions (B, Q, N, L band) of the Pc ligand a number of extra bands at 12–15 kK and 18–24 kK due to trip-doublet and (Pc→M)CT transitions. The effect of metal substitution is discussed. The r.r. spectra obtained by excitation between the B and Q band (λ₀ = 476.5 nm) are dominated by the intraconfigurational transition Γ₇ Γ ₈ arrising from the spin-orbit splitting of the electronic ground state for Fe^III at 536 cm^?1, for Ru^III at 961 cm^?1 and Os^III at 3 028 cm^?1. Thus the spin-orbit coupling constant increases very greatly down the iron group: Fe^III (357 cm^?1)< Ru^III (641 cm^?1)< Os^III (2 019 cm^?1). The Γ₇ Γ ₈-transition is followed by a very pronounced vibrational finestructure being composed in the r.r. spectra by the coupling with ν_s(MCl), δ(MClN) and the most intense fundamental vibrations of the Pc ligand. In absorption only vibronically induced transitions are observed for the Ru and Os complex at 1 700-2800 rsp. 3100-5800 em^?1 instead of the 0-0 phonon transitions. The most intense lines are attributed to combinations of the intense odd vibrational mo-des at ≈ 740 and 1120 cm^?1 with ν₅(MCI), δ(MClN).     

Darstellung der Iminiumsalze CF3?NXCF2+MF6− (X = CH3, F und M = As,Sb) und CF3?NCl = CF2+ AsF6−

Preparation of the Iminium Salts CF₃? NX?CF₂⁺MF₆^? (X = CH₃, F and M = As, Sb) and CF₃? NCl?CF₂⁺ AsF₆^? The preparation of the iminiumsalts CF₃? NX?CF₂⁺ MF₆^? (X = CH₃, F and M = As, Sb) and CF₃? NCl?CF₂⁺ AsF₆^? is reported. The salts were characterized by NMR and infrared spectroscopy. CF₃? NCH₃?CF₂⁺MF₆^? decompose into MF₅ and (CF₃)₂NCH₃.     

Vibrational analysis of 2-fluoropropane and 2-fluorobutane

Vibrational spectra were obtained for 2-fluorobutane in the vapor, liquid, and solid states. The S_HH and Spy conformers are present in the solid, and the S_HH conformer is present in the liquid and in lower concentration in the vapor. Vibrational assignments were made with the aid of normal coordinate calculations that fit thirty-six frequencies of 2-fluoropropane and S_HH 2-fluorobutane with an average error of 3.7 cm^?1. Only a few vibrations of 2-fluorobutane seem to be dependent on conformation. The “C—F stretching” frequency cannot be used to distinguish the conformers because of extensive interaction between this coordinate and others.     

Cobalt- und Rhodiumphthalocyanine mit O-, S- und Se-Donorliganden

Phthalocyanines of Cobalt and Rhodium with O, S, and Se Donor Ligands Di(phenolato)-, -(benzenethiolato)- and -(benzeneselenonato)phthalocyaninatocobaltate(III) and -rhodate(III) are prepared by the reaction of di(hydroxo)phthalocyaninatometalate with phenol resp. benzenethiol or benzeneselenol and isolated as poorly soluble tetra(n-butyl)ammonium salts of the formula (ⁿBu₄N)[M(EPh)₂Pc^2?] (M = Co, Rh; E = O, S, Se). In the Uv-vis spectra π–π* transitions in the Pc^2?-typical B, Q, N and L regions are observed. For the Rh-complexes with E = S, Se there is a further band at 18.0 kK due to excitonic π(Ph)–π(Pc) interactions. The (E→Rh-charge-transfer(CT)) transition is observed for E = Se at 26.0 kK, being obscured by the Q, N region for E = O, S. The strong, broad (E → Co? CT) transition (E = O, S, Se) absorbs at ～20.5 kK. A second CT-transition is detected within the Q, N region for E = S, Se. Molecular vibrations (in cm^?1) are examined by m.i.r., f.i.r, FT-Raman and dispersive resonance-Raman(RR) spectra. The C? E stretching mode (v_7a) of the axial EPh ligands is observed for E = O at 1256/1262, 1269 (Co, m.i.r./RR), 1246/1265 (Rh), for E = S at 1085 (Co, Rh; RR) and for E = Se at 1069 (Co, Rh; RR). The C? C? E deformation mode (v_6a) is assigned for E = O at 554/557 (Co, RR), 568 (Rh, RR) and for E = S at 420 (Co, Rh; RR). The following vibrational modes of the trans-ME₂N₄ skeleton are assigned: v_s(ME) for Co: 381 (O)/271 (S)/139 (Se); for Rh: 408/297/156; v_as(ME) for Co: 352/277/235; for Rh: 391/278/225; v_as(MN) absorbs nearly independent of M and E at ～325 (f.i.r.) M? E? C deformation modes are observed between 246 and 200 (f.i.r.) resp. 217 and 186 (RR).     

Gitterschwingungsspektren. LXIII. Be(lO3)2 · 4 H2O,ein Hydrat mit ungewöhnlicher Bindungsstruktur und Gitterdynamik

Lattice Vibration Spectra. LXIII. Be(IO₃)₂ · 4 H₂O, a Hydrate with Unusual Bonding and Lattice Dynamics The IR and Raman spectra (4000–50 cm^?1) of Be(IO₃)₂ · 4 H₂O and of deuterated specimens are recorded at 90 and 300 K and discussed in terms of the unusual relations of the masses of the atoms involved and the large polarization power of the beryllium ions. Thus, the translatory modes of the Be²⁺ ions (BeO₄ skeleton vibrations), the librations of the H₂O molecules, and the internal vibrations of the IO₃^? ions in the spectral regions of 300–400 and 600–1000 cm^?1 couple and coincide producing unusual v_H/v_D isotopic ratios of partly < 1. The H-bond donor strengths of the water molecules is so much increased (due to the very large ionic potential of Be²⁺ ions, viz. 49 e nm^?1) (synergetic effect) that the H-bonds formed are similar in strength as those in hydrates of hydroxides with the very strong H-bond acceptor group OH^? (v_OD of matrix isolated HDO molecules 2 074 and 2 244 (H₂O I) and 2 206 and 2 349 cm^?1 (H₂O II))     

Über die Darstellung der N-Chlor-N-Methylammoniumsalze (CH3)nNCl4–n+MF6− (n = 1–3; M = As,Sb) und (CH3)2NCIX+MF6− (X = F,Br)

About the Preparation of N-Chloro-N-Methylammonium Salts (CH₃)_nNCl_4–n⁺MF₆^? (n = 1–3; M = As, Sb) and (CH₃)₂NClX⁺MF₆^? (X = F, Br) Simple one-step methods for the preparation of the methylated chloroammonium salts (CH₃)_nNCl_4–n⁺MF₆^? (n = 1–3; M = As, Sb) and for (CH₃)₂NClX⁺MF₆^? (X = F, Br) are reported. Their vibrational and NMR-spectroscopical data are discussed in comparison.     

NiH3IO6 · 6H2O — Kristallstruktur und Schwingungsspektren

NiH₃IO₆ · 6 H₂O — Crystal Structures and Vibrational Spectra The crystal structure of NiH₃IO₆ · 6 H₂O has been determined by X-ray single-crystal diffraction (Pc, Z = 2, a = 516.74(9), b = 981.5(2), c = 1052.5(2) pm, β = 116.496(8)°) on the basis of 4169 unique reflections (R = 1.96%). The structure is built up of distorted Ni(H₂O)₆²⁺ and H₃IO₆^2? octahedra linked by hydrogen bonding. IR and Raman spectra of both the title compound and isostructural MgH₃IO₆ · 6 H₂O as well as of deuterated specimens are given. There are up to 14 different OH(OD) modes in the spectra of isotopically dilute samples due to the 15 different hydrogen positions of the structure. The internal modes of the meridional H₃IO₆^2? ions (pseudo C_2v symmetry) are discussed with respect to that double T-shaped entity, which gives rise to only two instead of 3I? O, I? O(H), and OH stretches in the IR and Raman spectra, i.e. the same as for facial (C_3v) structured ions.     

Borchelate und Bormetallchelate,V1

Substitution of only one bridged hydrogen atom of bis(1,2-cycloheptanedionedioximato)nickel(II) by the diphenylboron group is easily accomplished with formation of1. Both hydroxy groups of bis(dihydroxyboron-diaminoglyoximato)nickel(II) chelate² can be esterified by phenol or methanol (chelates2 a andb). The bis(diphenylboron) chelate3 a results from the reaction of bis(dihydroxyborondiaminoglyoximato)nickel(II) with diphenylboric anhydride. In the same way the corresponding chelates3 b-f are obtainable from the boron-free nickel chelates. The i.r. and u.v. spectra as well as the diamagnetic character of the compounds described are in agreement with planar structures.

IV. Mitt.:E. Hohaus, Mh. Chem., im Druck.     

Metallorganische Lewis-Säuren. XLII. Carbonyl- und Nitrosyl-Komplexe von Mangan und Rhenium mit schwach koordinierten Anionen (Ph3P)2(ON)2MnX, (Ph3P)n(OC)5–nMX (M = Mn,Re; n = 1, 2; X = FBF3, OSO2CF3, OSO2F,OCORf)

Organometallic Lewis Acids. XLII. Carbonyl- and Nitrosyl Complexes of Manganese and Rhenium of Weakly Coordinated Anions (Ph₃P)₂(ON)₂MnX, (Ph₃P)_n(OC)_5–nMX (M = Mn, Re; n = 1, 2; X = FBF₃, OSO₂CF₃, OSO₂F, OCOR_f) The complexes (Ph₃P)₂(ON)₂MnX (X = FBF₃, OSO₂CF₃, OSO₂F, OCOCF₃, OCOC₃F₇) and (Ph₃P)_n(OC)_5–nMX (M = Mn, Re; n = 1, 2; X = FBF₃, OSO₂CF₃) have been obtained by reaction of (Ph₃P)₂(ON)₂MnH and (Ph₃P)_n(OC)_5–nMeMe with the corresponding acids HX or from (Ph₃P)_n(OC)_5–nReBr (n = 1, 2) with silver salts AgX, respectively. The compounds have been characterized by their IR and partially by ¹⁹F-NMR data. An efficient method for the preparation of the hydride (Ph₃P)₂(ON)₂MnH is reported.     

Gitterschwingungsspektren. LXXVI. Zur Kenntnis basischer Kupfersalze — Kristallstruktur und schwingungsspektroskopische Untersuchungen an Cu2(OH)3NO2

Lattice Vibration Spectra. LXXVI. On Basic Copper Salts — Crystal Structure, IR and Raman Spectra of Cu₂(OH)₃NO₂ Single-crystal X-ray as well as IR and Raman data of Cu₂(OH)₃NO₂ are presented and discussed with respect to an order-disorder (OD) phase transition and the strength of hydrogen bonds. Cu₂(OH)₃NO₂ crystallizes pseudosymmetrically in the monoclinic space group P2₁/m (Z = 2, a = 562.22(4), b = 605.94(5), c = 663.55(4) pm and β = 95.415(5)°) forming a layered structure of edge-connected, elongated CuO₆ octahedra (final R value 2.5% for 1047 symmetry averaged reflections with I ≥ 2.5 μ₁). The NO₂^? ions are on a split position with dynamic disordering at ambient temperature. On temperature lowering the disorder is frozen out with a symmetry decrease to space group P2₁. The disorder of the NO₂^? ions causes four different arrangements of OH₍₂₎^? with different strengths of the H…O hydrogen bonds present OD stretching modes in the spectra of isotopically dilute samples 2628, 2535, 2435, and 2343 cm^?1 at 90 K. The OH₍₁₎^? ions form weak H…N H-bonds to the lone-pair of the nitrogen atoms of the NO₂^? ions (v_OD 2563 cm^?1).