bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis, Spectroscopic Study and Crystal Structure Determination by X‐ray Powder Diffractometry of [CdCl2(TzTn)] [TzTn=2‐(3,4‐dichlorophenyl)imino‐N‐(2‐thiazolin‐2‐yl)tetrahydro‐1,3‐thiazine]
Authors: Lozano‐Vila A. M. , Cumbrera F. L. , Luna‐Giles F. , Ortiz A. L. , Bernalte‐García A. 
Published: August 2007

AbstractThe cadmium(II) complex, dichloro[2‐(3,4‐dichlorophenyl)imino‐κN‐N‐(2‐thiazolin‐κN‐2‐yl)tetrahydro‐1,3‐thiazin]cadmium(II), was synthesized in the form of fine powder with small crystals unsuitable for structure determination by X‐ray single‐crystal diffractometry, and was therefore characterized by X‐ray powder diffractometry. To that end, the molecular structure was first analyzed using various instrumental techniques including elemental analysis, FAB‐mass spectroscopy, and infrared spectroscopy, and then optimized via molecular modeling with a semi‐empirical quantum‐chemistry model. From the optimized molecule, the crystal structure wasresolved within the methodological framework of the direct‐space methods using a ‘Monte‐Carlo/parallel tempering’ search algorithm, and then refined using the Rietveld method. It was found that the title compound crystallizes in the triclinic system, with the space group $\rm P{\bar 1}$, two C13H13Cl4CdN3S2 molecules in the asymmetric unit, and the following unit cell dimensions: a = 13.558(4) Å, b = 13.579(7) Å, c = 10.117(4) Å, α = 91.07(3)°, β = 95.44(3)°, and γ = 93.03(3)°. It was also found that the environment around the cadmium(II) ion may be described as distorted tetrahedral, with the metallic atom coordinated to two chlorine atoms [Cd(A)‐Cl(1A) = 2.44(3) Å; Cd(A)‐Cl(2A) = 2.44(3) Å; Cd(B)‐Cl(1B) = 2.45(3) Å; Cd(B)‐Cl(2B) = 2.45(3) Å], one imino nitrogen atom [Cd(A)‐N(3A) = 2.37(10) Å; Cd(B)‐N(3B) = 2.37(9) Å], and one thiazoline nitrogen atom [Cd(A)‐N(1A) = 2.33(8) Å; Cd(B)‐N(1B) = 2.33(10) Å].
Two‐dimensional Holodirected Lead(II) Coordination Polymer, [Pb(μ‐bpp)(μ‐SCN)2]n (bpp = 1,3‐di(4‐pyridyl)propane)
Authors: Taheri Syavash , Mojidov Ajdar , Morsali Ali 
Published: August 2007

AbstractA lead(II) complex with 1,3‐di(4‐pyridyl)propane (bpp) and thiocyanate ligands, [Pb(μ‐bpp)(μ‐SCN)2]n (1), has been synthesized and characterized by CHN elemental analysis, IR‐, 1H‐ and 13C NMR spectroscopy. The single crystal X‐ray data of compound 1 show that the complex is two‐dimensional coordination polymer and the Pb atom has less‐common six–coordinate holodirected arrangement.
Ferrocenophanes with Interannular Nitrogen‐Aluminum Bridges – Synthesis and Structure
Authors: Wrackmeyer Bernd , Klimkina Elena V. , Milius Wolfgang 
Published: August 2007

AbstractThe reaction of 1,1′‐bis(trimethylsilylamino)ferrocene (1) with trimethyl‐ or triethylaluminum proceeds by elimination of methane or ethane, respectively, to novel ferrocenophanes 2a,b containing an N2Al2 bridge. Addition of pyridine to 2 affords the pyridine adducts of 1,3‐diaza‐2‐alkylalumina‐[3]ferrocenophanes (4a,b) and of AlR3. The [3]ferrocenophanes 4 can be converted into 2 by addition of AlR3. The solution‐state structure of the new compounds follows from a consistent set of NMR spectroscopic data (1H, 13C, 15N, 27Al and 29Si NMR) measured at variable temperature. The molecular structures of the 2b and 4a,b were determined by single crystal X‐ray analyses.
Incidence of Microwave Hydrothermal Treatments on the Crystallinity Properties of Hydrotalcite‐like Compounds
Authors: Benito P. , Guinea I. , Herrero M. , Labajos F. M. , Rives V. 
Published: August 2007

AbstractLayered double hydroxides with different cations in the layers, MgAl, ZnAl and CoAl, have been prepared. The solids were obtained by the coprecipitation method and then they were submitted to the microwave radiation in order to improve the crystallinity and minimize the particle size of the solids. The samples were characterized by element chemical analysis, powder X‐ray diffraction, FT‐IR spectroscopy, particle size distribution, and transmission electron microscopy.
Synthesis, Crystal Structure and Magnetic Properties of 4,4′‐ Bipyridine Bridged Dinuclear Iron(III) Complex containing N,N′‐Ethylene‐Bis(salicylideneiminato)
Authors: Feng Xun , Wang Jian‐Ge , Xie Cheng‐Zhi , Ma Ning 
Published: August 2007

AbstractA new bis‐Schiff base iron(III) dinuclear complex [(Fe2(salen)2bipy(NCS)2] (salen = N,N′‐ethylene‐bis(salicylideneiminato), 4,4′‐bipy = 4,4′‐bipyridine) has been prepared by one–pot template condensation and characterized by X‐ray diffraction and magnetochemistry. The structure consists of two pseudo‐octahedral high‐spin iron(III) units linked by 4,4′‐bipy. The iron(III) ion has distorted octahedral coordination with a N2O4 donor set. The symmetry moiety of N, N′ bis‐(salicylideneamino)ethanato ligand coordinates to the iron(III) ion in equatorial plane in a tetradentate mode including phenol oxygen and imine nitrogen atom, the axial positions are occupied by the nitrogen atoms from isothiocyanato group and the 4,4′‐bipy ligand. Variable–temperature magnetic measurements in the range 2‐300 K of the complex indicate the presence of weak antiferromagnetic exchange between the two nearest Fe3+ ions with J = –0.38 cm−1.
Syntheses, Structures and Luminescent Properties of Three Silver(I) Complexes with a Novel Imidazole‐Containing Schiff Base Ligand
Authors: Lu Xi‐Hong , Huang Yong‐Qing , Kong Ling‐Yan , Okamura Taka‐aki , Sun Wei‐Yin , Ueyama Norikazu 
Published: August 2007

AbstractThree novel silver(I) complexes [Ag2(L)2](NO3)2 (1), [Ag2(L)2](BF4)2 (2) and [Ag2(L)2](CF3CO2)2 (3) have been synthesized by reactions of Schiff base ligand 1‐(imidazol‐4‐yl)‐5‐(imidazol‐1‐yl)‐2‐azapent‐1‐ene (L) with the corresponding metal salts and characterized by single crystal X‐ray diffraction analysis. Complex 1 has one dimensional (1D) chain structure, while complex 2 has two‐dimensional (2D) network structure, in which two unique 1D chains with different shapes are linked together via Ag···Ag interactions. Complex 3 features a discrete M2L2 molecular ring. The results show that the nature of the counterions has remarkable impact on the structure of the supramolecular structures. The photoluminescent properties of the synthesized complexes were studied in the solid state at room temperature. In addition, complex 1 was further investigated by electrospray mass spectrometry.
The Influence of the Methyl Substituents at C2 Carbon of Thiosemicarbazones {R1R2C2=N3‐N2H‐C1(=S)N1H2} on Bonding and Structures of Copper(I) Complexes
Authors: Lobana Tarlok S. , Khanna Sonia , Butcher Ray J. 
Published: August 2007

AbstractReaction of copper(I) halides with acetone thiosemicarbazone (Hactsc) and acetaldehyde thiosemicarbazone (Hmtsc) in CH3CN in the presence of PPh3 has formed dimeric complexes of type, [Cu2(μ‐X)2(η1‐S‐Htsc)2(Ph3P)2] (Htsc: X; Hmtsc, Br, 1; I, 2; Hactsc, I, 3; Cl, 5), and a monomer, [CuBr((η1‐S‐Hactsc)(Ph3P)2 (4). The complexes have been characterized using analytical data, spectroscopy and X‐ray crystallography (1–4). The presence of methyl substituents at C2 carbon of thiosemicarbazone seems to alter inter‐ and intra‐molecular hydrogen bonding. Intermolecular and intramolecular interactions by amino and imino hydrogen atoms respectively with bridging halogen atom shorten X–Cu–X bond angle, and open up Cu–X–Cu bond angle, resulting in longer Cu···Cu separation (3.50–3.61Å) in complexes 1–3.
Synthesis and Structure of Half‐Sandwich Zincocenes
Authors: Resa Irene , Álvarez Eleuterio , Carmona Ernesto 
Published: August 2007

AbstractHalf‐sandwich zinc complexes (η5‐C5Me5)ZnR have been prepared for R= Me,2; Et,3; Mes,4and Ph,5, by the conproportionation reaction of Zn(C5Me5)2and the corresponding ZnR2reagent. The new compounds have been fully characterized by spectroscopy and in the cases of2and4by X‐ray crystallography. Since the reaction of Zn(C5Me5)2and ZnEt2yields3, together with the known dizincocene Zn2(η5‐C5Me5)2, the rearrangements of the related zincocenes ZnCp2′ and ZnEt2were investigated, with the result that only the half‐sandwich (η5‐Cp′)ZnEt derivatives (Cp′= C5Me4SiMe3(6); C5Me4CMe3(7) and C5Me4H (8)) were produced.
Electrochemical Synthesis and Characterization of Zinc(II) and Cadmium(II) Complexes of Dianionic Tetradentate Schiff Base Ligand
Authors: Rodríguez Laura , Labisbal Elena , Sousa‐Pedrares Antonio , Romero Jaime , García Vázquez José‐Arturo , Sousa Antonio 
Published: August 2007

AbstractThe electrochemical oxidation of anodic metal (zinc or cadmium) in acetonitrile solution of the potentially chelating Schiff base N,N‐(dithiodiethylenebis(aminylydenemethylydene)bis(1,2‐phenylene)ditosylamide (H2L) afforded stable complexes of empirical formula [ML]. The crystal and molecular structures of [ZnL]·CH3CN (1) and [CdL] (2) have been determined by X‐ray diffraction. In both complexes the metal atom is in a distorted tetrahedral environment with the Schiff base acting as a tetradentate N4 donor. Spectroscopic data for the complexes (IR, ES MS and 1H NMR spectra) are discussed and related to the structural information.
Synthesis, Crystal Structures and Properties of [Cu(L1)2(py)2(H2O)](H2O)[HL1 = N‐(5‐ethyl‐[1,3,4]–thiadiazole‐2‐yl)‐toluenesulfonamidate] and [Cu(L2)2(py)2(H2O)] [HL2 = N‐(5‐ethyl‐[1,3,4]–thiadiazole‐2‐yl)‐benzenesulfonamidate]
Authors: Hangan Adriana , Borras Joaquin , Liu‐Gonzalez Malva , Oprean Luminita 
Published: August 2007

AbstractA series of new N‐sulfonamidate ligands and their cooper(II) complexes, [Cu(N‐(5‐ethyl‐[1,3,4]‐thiadiazole‐2‐yl)‐toluenesulfonamidate)2(py)2(H2O)](H2O) (1) and [Cu(N‐(5‐ethyl‐[1,3,4]‐thiadiazole‐2‐yl)‐benzenesulfonamidate)2(py)2(H2O)] (2) have been synthesized and characterized. The X‐ray crystal structures of the complexes 1 and 2 have been determined. In the both two complexes, the Cu2+ ion is five‐coordinated, forming a CuN4O chromophore. The ligands act as monodentate, coordinating the metal ion through a single Nthiadiazole atom. The molecules from the reaction medium (pyridine and water) also participate to the coordination of Cu2+ ion as monodentate ligands. Both two complexes have a slightly distorted square pyramidal geometry. The chemical properties of the complexes have been studied by FT‐IR, electronic and EPR spectroscopic methods.
Metal Complexes with a New Ethyl Acetate Pendant‐Armed Macrocyclic Ligand – Crystal Structures of [MnL](ClO4)2 and [NiL](ClO4)2·CH3CN
Authors: López‐Deber M. , Bastida de la Calle R. , Macías A. , Pérez‐Lourido P. , Rodríguez A. , Valencia Matarranz L. 
Published: August 2007

AbstractA new ligand, L, bearing two ethyl acetate pendant groups has been synthesized by reaction of the precursor ligand LA with ethylbromoacetate. The coordination capability towards transition [Mn2+, Ni2+], post‐transitional [Zn2+ and Cd2+] and Pb2+ ions has been investigated starting from the hydrated perchlorate salts of the metals. The new ligand L and the metal complexes obtained were characterized by elemental analysis, FAB MS, conductivity measurements, magnetic studies, IR, UV‐vis and 1H and 13C NMR spectroscopy. Furthermore, the crystal structures of the complexes [MnL](ClO4)2 and [NiL](ClO4)2·CH3CN were determined.
Synthesis and Characterization of Cobalt Complexes of Heterocyclic Bidentate Ligands (N,X), X= S, Se
Authors: Valenzuela E. , Sousa‐Pedrares A. , Durán‐Carril M. L. , García‐Vázquez J. A. , Romero J. , Sousa A. 
Published: August 2007

AbstractThe synthesis and structural characterization of a series of homoleptic cobalt complexes of general formula [Co(R‐pyX)3] is reported, where X = S, Se; R = H, 3‐CF3 and 5‐CF3. The compounds were synthesized by electrochemical oxidation of the metal in a cell containing an acetonitrile solution of the corresponding ligand. When 2,2′‐bipyridine (bipy) or 1,10‐phenanthroline (phen) were added to the electrolytic cell, mixed cobalt(II) compounds [Co(R‐pyX)2L] (L = bipy, phen) were also isolated. All of the complexes obtained have been characterized by microanalysis, vibrational and electronic spectroscopy, FAB mass spectrometry and, in the case of diamagnetic compounds that were sufficiently soluble, by 1H and 13C NMR spectroscopy. Crystals of [Co(3‐CF3‐pyS)3] and [Co(5‐CF3‐pyS)3] were obtained and studied by X‐ray diffraction. The crystal structures consist of monomeric molecules with the metal atom in an octahedral environment and the ligands in a meridional disposition.
Comparative Study of Reactivity of Copper(II) Salts with N,N′‐Dipyridyl Ligands. Structural Diversity and Magnetic Properties
Authors: Delgado S. , Medina M. E. , Pastor C.J. , Jiménez‐Aparicio R. , Priego J. L. 
Published: August 2007

AbstractThe coordination chemistry of 1,2‐bis(2‐pyridyl)butadiyne (dpb) 2,5‐bis(2‐pyridylethynyl)thiophene (dpet) (rigid ligands) and 4,4′‐dipyridyldisulfide (4‐dpds) (flexible ligand) with Cu(tfac)2 (tfac= trifluoroacetylacetonate) and Cu(BF4)·xH2O have been investigated in order to test the influence of different anions on the overall structure. Three of the resulting metal‐organic assemblies have been determined. These crystal structures have shown that the geometry and coordinating properties of the corresponding anions together with the positional orientation of the nitrogen atoms in the ligands are essential in determining the final structures of the assemblies. So, reactions with Cu(tfac)2 lead to dimeric compounds [Cu2(tfac)4(L)] for L = dpb 1 and dpet 2 and one‐dimensional polymer [Cu(tfac)2(4‐dpds)]n (3) for 4‐dpds ligand. On the other hand analogous reactions with Cu(BF4)·xH2O afforded the copper(II) complexes [Cu(dpb)(BF4)2·(CH3OH)1.5]n (4) and [Cu(4‐dpds)2/(BF4)2(MeOH)(CH2Cl2)]n (6) for dpb and 4‐dpds ligands as well as the copper(I) compound [Cu(dpet)2]n(BF4)·CH2Cl2 (5) for dpet ligand. In addition to this, magnetic properties have been studied.
Synthesis and Characterization of Triphenylphosphinesilver(I) Sulfanylcarboxylates of the Type [HQ][Ag(PPh3)(L)] [HQ] = Diisopropylammonium
Authors: Barreiro Elena , Casas José S. , Couce María D. , Sánchez Agustín , Sordo José , Varela José M. , Vázquez‐López Ezequiel M. 
Published: August 2007

AbstractCompounds of the type [HQ][Ag(PPh3)(L)] {H2L = H2xspa: x = p (3‐phenyl‐), Clp [3‐(2‐chlorophenyl)‐], ‐o‐mp [(3‐(2‐methoxyphenyl)‐], ‐p‐mp [(3‐(4‐methoxyphenyl)‐], ‐o‐hp [3‐(2‐hydroxyphenyl)‐], ‐p‐hp [3‐(4‐hydroxyphenyl)‐], diBr‐o‐hp [3‐(3,5‐dibromo‐2‐hydroxyphenyl)‐], f [3‐(2‐furyl)‐], t [3‐(2‐thienyl)‐], ‐o‐py 3‐(2‐pyridyl); spa = 2‐sulfanylpropenoato and 2‐cyclopentylidene‐2‐sulfanylacetic acid (H2cpa)} were synthesized and characterized by IR, Raman and NMR (1H, 13C and 31P) spectroscopy and by FAB mass spectrometry. The structure of [HQ][Ag(PPh3)(pspa)] (1) shows that the crystal contains hydrogen‐bonded diisopropylammonium cations and [Ag(PPh3)(pspa)]22− anions, which have a central Ag2S2 planar ring, to give extended chains.
Cycloplatination of Thiosemicarbazones Derived from Furane. Crystal and Molecular Structure of [{Pt[(OC4H2)C(Me)=NN=C(S)NHEt]}2{μ‐Ph2P(CH2)2PPh2}]
Authors: Adrio Luis , Antelo José M. , Ortigueira Juan M. , Lata Darío , Pereira Teresa , López‐Torres Margarita , Vila José M. 
Published: August 2007

AbstractTreatment of thiosemicarbazones (OC4H3)C(Me)=NN(H)C(=S)NHR (R: Me, a; Et, b) with [cis‐PtMe2(cod)] afforded the tetranuclear compounds [Pt{(OC4H2)C(Me)=NN=C(S)NHR}]4 (R: Me, 1a; Et, 1b). The reaction of 1a and 1b with triphenylphosphine in 1:4 molar ratio gave rise to the mononuclear compounds [Pt{(OC4H2)C(Me)=NN=C(S)NHR}(PPh3)] (2a, 2b). Treatment of 1a and 1b with large‐bite diphosphines Ph2P(CH2)nPPh2 (n = 2, dppe; n = 3, dppp; n = 4, dppb) afforded the dinuclear compounds ‐[{Pt[(OC4H2)C(Me)=NN=C(S)NHR]}2{μ‐Ph2P(CH2)nPPh2}], (3a–5a, 3b–5b), with the diphosphine in a bridging mode. Similar reactions with the short‐bite diphosphines Ph2PCH2PPh2 (dppm) and Ph2PC(=CH2)PPh2 (vdpp) yielded the mononuclear compounds [Pt{(OC4H2)C(Me)=NN=C(S)NHR}‐(Ph2PCH2PPh2‐P)] (6a, 6b) and [Pt{(OC4H2)C(Me)=NN=C(S)NHR}(Ph2P‐C(=CH2)PPh2‐P)] (7a, 7b) with the diphosphine in a monodentate coordination. Treatment of 1a and 1b with [W(CO)5(Ph2CH2PPh2)] gave the novel heterodinuclear species [{Pt[(OC4H2)C(Me)=NN=C(S)NHR]}{W(CO)5(Ph2CH2PPh2‐P)}] (8a, 8b), which could also be synthesized by reaction of 6a and 6b with [W(CO)5(THF)]. 1H, 31P‐{1H} and 13C‐{1H} NMR and IR data are given. The crystal structure of compound 3b has been determined by X‐ray crystallography.
Copper(II) and Nickel(II) Complexes of two Nitrogen‐Functionalized N‐Salicylidene Carbonic Acid Hydrazides: Molecular and Supramolecular Architectures
Authors: Roth Arne , Buchholz Axel , Gärtner Martin , Malassa Astrid , Görls Helmar , Vaughan Gavin , Plass Winfried 
Published: August 2007

AbstractCopper(II) and nickel(II) complexes with the new Schiff‐base ligands N‐salicylidene‐3‐(2‐pyridyl)‐propionic acid hydrazide (H2salhypyp) and the newly synthesized N‐Salicylidene‐3‐(1‐benzylimidazol‐2‐yl)‐propionic acid hydrazide (H2salhyimp) have been synthesized and structurally characterized. The crystal structure analysis of the metal complexes reveals two fundamentally different structural motifs. Cationic di‐μ‐phenolate‐bridged dimers are observed for the complexes with the H2salhypyp ligand, [{Cu(H2salhypyp)(MeOH)(ClO4)}2](ClO4)2 (1) and [{Ni(H2salhypyp)Cl(MeOH)}2]Cl2(MeOH)2 (2), whereas neutral dimeric units aggregated via the side chain nitrogen donors are observed for the complexes with the H2salhyimp ligand, [{Ni(salhyimp)}2](H2O)4 (4) and [{Cu(salhyimp)}2](MeOH)4 (3). The formation of either motif depends on the charge of the ligand species and consequently on the pH‐value of the reaction solution. For the complexes 1 and 2 extensive hydrogen‐bonding networks are observed which involve the perchlorate (N–H···O–Cl) and chloride anions (N–H···Cl), respectively. The M2O2 core unit of complexes 1 and 2 facilitates the formation of intramolecular M–(Me)O–H···X–M hydrogen‐bonding interactions $\rm (X = ClO^{-}_{4}, Cl^{-})$. The copper complex 3 exhibits an unusual one‐dimensional coordination polymer which is linked through the axial coordination of phenolate oxygen atoms of adjacent dimeric units. Complex 4 exhibits a layered structure with each layer composed of hydrophobic π‐stacks of the dimeric complex units which are interlaced by hydrogen‐bonded chains of water molecules. The supramolecular structures of 3 and 4 are governed by π‐π‐stacking interactions. For 4 additional CH/π interactions are found within and between individual sheets of the layered structure.
Synthesis, Structure and Chemical Bonding of RE4RuMg (RE = La–Nd, Sm, Gd–Ho)
Authors: Tuncel Selcan , Chevalier Bernard , Matar Samir F. , Pöttgen Rainer 
Published: August 2007

AbstractThe rare earth metal rich compounds RE4RuMg (RE = La–Nd, Sm, Gd–Ho) were obtained by induction‐melting of the elements in sealed tantalum tubes in a water‐cooled sample chamber of a high‐frequency furnace. The RE4RuMg compounds were studied by powder X‐ray diffraction: Gd4RhIn type, $F {\rm {\bar 4}}{\rm 3}m$, a = 1433.6(2) pm for La4RuMg, a = 1408.1(2) pm for Ce4RuMg, a = 1405.9(1) pm for Pr4RuMg, a = 1399.5(3) pm for Nd4RuMg, a = 1384.7(1) pm for Sm4RuMg, a = 1381.4(2) pm for Gd4RuMg, a = 1371.1(2) pm for Tb4RuMg, a = 1367.2(2) pm for Dy4RuMg, and a = 1361.4(5) pm for Ho4RuMg. The structures of RE4RuMg with RE = La, Pr, Nd, and Sm were refined from single crystal diffractometer data. The RE4RuMg structures consist of a three‐dimensional network of edge‐ and corner‐sharing RuRE6 trigonal prisms. In contrast to the isotypic series RE4CoMg and RE4RhMg, the ruthenium atoms displace from the centers of the prisms. The voids within the three‐dimensional network are filled by regular Mg4 tetrahedra at a Mg–Mg distance of 316 pm in La4RuMg. The magnesium atoms have icosahedral coordination by three magnesium and nine rare earth metal atoms. The samarium based crystal revealed a small homogeneity range Sm3−xRu1+yMg1+x−y leading to the refined composition Sm3.92Ru1.16Mg0.92. Chemical bonding in La4RuMg was studied in comparison with La4CoMg. The La1–Mg bonding is found to be dominating among the La–Mg interactions in both systems. Differences in chemical bonding due to a reduced valence electron concentration and different La2–Ru versus La3–Ru distances within RuLa23La33 prisms are traced out.
Isolation of a Manganese Complex of a Tridentate Azo‐aromatic Ligand from an Unusual Mn2(CO)10 Promoted Simultaneous Reductive Azo Cleavage and Aromatic Ring Amination Reactions
Authors: Chatterjee Sudipta , Sanyal Anasuya , Hung Chen‐Hsiung , Goswami Sreebrata 
Published: August 2007

AbstractThe reaction of Mn2(CO)10 with pap [pap = 2‐(phenylazo) pyridine, L1] in boiling n‐octane affords a violet complex, [Mn(L2)2] (1, HL2 NH4C5N=NC6H4N(H)C6H5). This reaction exemplifies an unusual transformation wherein the anionic tridentate ligand (L2)− is formed by the fusion of phenyl imide fragment, originated from the splitting of the –N=N‐ function of L1, to pendant phenyl ring of the coordinated azo ligand. X‐ray structure of the manganese complex is reported.
Primary and P‐Alkylated o‐Phosphanylphenols: Synthesis by Reduction and Reductive Alkylation of Diethyl Arylphosphonates and Screening in Ethylene Polymerization
Authors: Heinicke Joachim , Musina Elvira , Peulecke Normen , Karasik Andrey A. , Kindermann Markus K. , Dobrynin Alexey B. , Litvinov Igor A. 
Published: August 2007

AbstractVarious diethyl aryl phosphates 1a‐e and the 2‐bromo derivatives 2a,d were ortholithiated to access the corresponding rearranged O‐lithiated 2‐hydroxy‐benzene‐phosphonates 3a‐e. These compounds or the isolated free hydroxyl derivatives 4 were reduced by LiAlH4 in the absence and presence of alkyl halides to give primary 2‐phosphanylphenols 5 and P‐alkylated derivatives 6‐11. The reductive alkylation allows a one‐step access to P‐secondary or P‐tertiary 2‐phosphanylphenols from 3 or 4. The selectivity depends on the substitution pattern. Screening of 2‐phosphanylphenol / Ni(COD)2 solutions in ethylene batch polymerizations revealed higher conversion and polymer chain lengths by catalysts with O‐basic secondary and even primary than with 2‐diphenylphosphanylphenolate ligands.
Chloro‐2‐(diphenylphosphino)benzaldehyde 4‐phenylsemicarbazonato‐P, N, N′)methoxooxorhenium(V) – a Semicarbazone Complex with an Unusual Coordination Mode
Authors: Barandov Ali , Abram Ulrich 
Published: August 2007

Abstract(NBu4)[ReOCl4] reacts with 2‐(diphenylphosphino)benzaldehyde 4‐phenylsemicarbazone (HL1) in methanol under formation of the red rhenium(V) complex [ReO(Cl)(OMe)(L1)]. The semicarbazonato ligand is singly deprotonated and coordinates meridionally via the phosphorus atom and two nitrogen atoms. This unusual coordination mode of a semicarbazone is confirmed by IR and NMR spectroscopy and by the solid state structure of the product.
The First Crystal Structures of Mercury(II) Complexes of Tetra‐amides (L1 and L2) and Tetramethylamides (L3 and L4) of EDTA and PDTA. Formation of Distorted Octahedral and Distorted Capped Octahedral Mercury(II) Complexes and of a Trinuclear Complex containing HgCl2‐bridged [Hg(L3)Cl]+ Moieties
Authors: Krot Krystyna , Llamas‐Saiz Antonio L. , Vembu Nagarajan , Nolan Kevin B. 
Published: August 2007

AbstractThe first crystal structures of HgII complexes of EDTA and PDTA tetra‐amides are reported. Reaction of EDTA and PDTA tetra‐amides (L1 and L2) and tetramethylamides (L3 and L4) with HgCl2 in water/ethanol/acetone produced complexes of formula [Hg(L1)Cl][HgCl4]0.5·0.5H2O, (1), [Hg(L2)Cl]2[HgCl4]·6H2O, (2), [Hg3(L3)2Cl4][HgCl3]2·2H2O, (3), [Hg(L3)Cl]2(PF6)2·5H2O, (4), and [Hg(L4)Cl]2[HgCl3]2·1.5H2O, (5), in which the denticity of the tetraamide ligand is 6 in complexes 1 ‐ 4 but 5 in complex 5 giving distorted capped octahedral 7‐coordinate complexes and distorted octahedral 6‐coordinate complexes, respectively. Complex 3 contains a trinuclear cation resulting from HgCl2‐bridging of two [HgL3(Cl)]+moieties. The X‐ray crystal structures of the complexes reveal the existence of supramolecular aggregates resulting from infinite 3D frameworks of H‐bonds.