bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rare‐Earth‐Rich Magnesium Compounds RE23Rh7Mg4 (RE = La, Ce, Pr, Nd, Sm, Gd) with Tetrahedral Mg4 Clusters
Authors: Linsinger Stefan , Tuncel Selcan , Hermes Wilfried , Eul Matthias , Chevalier Bernard , Pöttgen Rainer 
Published: February 2009

AbstractThe rare earth‐rich compounds RE23Rh7Mg4 (RE = La, Ce, Pr, Nd, Sm, Gd) were prepared by induction‐melting the elements in sealed tantalum tubes. The new compounds were characterized by X‐ray powder diffraction. They crystallize with the hexagonal Pr23Ir7Mg4 type structure, space group P63mc. The structures of La23Rh7Mg4 (a = 1019.1(1), c = 2303.7(4) pm, wR2 = 0.0827, 1979 F2 values, 69 variables), Nd23Rh7Mg4 (a = 995.4(2), c = 2242.3(5) pm, wR2 = 0.0592, 2555 F2 values, 74 variables) and Gd23Rh6.86(5)Mg4 (a = 980.5(2), c = 2205.9(5) pm, wR2 = 0.0390, 2083 F2 values, 71 variables) were refined from single crystal X‐ray diffractometer data. The three crystallographically different rhodium atoms have trigonal prismatic rare earth coordination with short RE–Rh distances (283–300 pm in Nd23Rh7Mg4). The prisms are condensed via common edges, leading to a rigid three‐dimensional network in which isolated Mg4 tetrahedra (312–317 pm Mg–Mg in Nd23Rh7Mg4) are embedded. Temperature dependent magnetic susceptibility data of Ce23Rh7Mg4 indicate Curie‐Weiss behavior with an experimental magnetic moment of 2.52(1) μB/Ce atom, indicative for stable trivalent cerium. Antiferromagnetic ordering is evident at 2.9 K.
Synthesis and Characterization of β‐Diketiminate Zinc Complexes
Authors: Schulz Stephan , Eisenmann Tamara , Westphal Ulrich , Schmidt Sarah , Flörke Ulrich 
Published: February 2009

AbstractThe monomeric β‐diketiminate zinc complex (Mes)NacNacZnMe 1 (MesNacNac = {[2,6‐(2,4,6‐Me3‐C6H2)N(Me)C)]2CH}) was obtained in almost quantitative yield from the reaction of ZnMe2 with (Mes)NacNacH. Reaction of 1 with either Me3NHCl or a solution of HCl in Et2O yielded (Mes)NacNacZnCl 2, whereas (Mes)NacNacZnI 3 was obtained from the reaction of 1 with I2. 1–3 were characterized by elemental analyses, mass and multinuclear (1H, 13C{1H}) NMR spectroscopy, 3·THF also by single crystal X‐ray analysis.
Multidimensional Snowflake‐shaped (3, 9)‐connected Metal‐Organic Frameworks Composed of Ni3(μ3‐O) Building Blocks and Symmetry Ligand Pyridine‐3,5‐dicarboxylic Acid
Authors: Du Lin , Wang Kun‐Miao , Fang Rui‐Bing , Zhao Qi‐Hua 
Published: February 2009

AbstractA metal‐organic polymer [Ni3(μ3‐O)(PDB)3]·H2O (1) (PDB = pyridine‐3,5‐dicarboxylate), with antiferromagnetic interactions between the adjacent Ni atoms, containing trinuclear μ3‐oxo‐bridged metal units Ni3(μ3‐O) have been synthesized by hydrothermal reaction of the achiral building blocks pyridine‐3,5‐dicarboxylate (3,5‐PDB) and Ni(NO3)2·4H2O. Compound 1 shows a high symmetry three‐dimensional snowflake‐shaped (3, 9)‐connected topology structures in which μ3‐oxo mixed‐valence Ni3O(CO2)6 clusters act as nine‐connected nodes and PDB ligands act as three‐connected nodes.
Nickel(II)‐Complexes of Aliphatic and Aromatic Nitro Compounds: Preparation and Crystal Structures of [Ni2L(μ1,3‐O2NC6H4O)][ClO4] and [Ni2L(μ1,3‐O2P(OC6H4NO2)2)][BPh4] (L = macrocyclic hexaamine‐dithiophenolate ligand)
Authors: Steinfeld Gunther , Kersting Berthold 
Published: February 2009

AbstractThe dinuclear NiII complex [Ni2LCl][ClO4] (1[ClO4]), where L2− is a 24‐membered macrocyclic hexaamine‐dithiophenolate ligand, has been examined regarding its ability to coordinate organic nitro compounds (i.e. para‐nitrophenolate, nitromethane, and bis(para‐nitrophenyl)phosphate). Complex 1[ClO4] reacts with para‐nitrophenolate in methanol to produce [Ni2L(μ1,3‐O2NC6H4O)][ClO4] (2[ClO4]), the crystal structure determination of which reveals a bridging para‐nitrophenolate ligand in its aci‐nitro resonance form. The reaction of 1[ClO4] with nitromethane in basic solution affords the known nitrite complex [Ni2L(μ1,2‐NO2)][ClO4] (3[ClO4]), rather than an aci‐nitromethanid complex [Ni2L(μ1,2‐O2N=CH2)]+ (4). The reaction of 1[ClO4] with bis(para‐nitrophenyl)phosphate yielded [Ni2L(μ1,3‐O2P(OC6H4NO2)2)]+ (5), which reveals a μ1,3‐bridging bis(para‐nitrophenyl)phosphate‐ligand.
Synthesis, Structure and Magnetic Properties of a Cyano‐bridged Dinuclear Compound fac‐{[FeIII(pzTp)(CN)2(μ‐CN)] CuII(TPyA)}·Et2O·ClO4 (pzTp = tetrakis(pyrazolyl)borate)
Authors: Wu Da‐Yu , Sato Osamu 
Published: February 2009

AbstractThe reaction of tricyanometallate precursor, (Bu4N)[(pzTp)Fe(CN)3] with Cu(ClO4)2·6H2O in the presence of the tetradentate ligand tris(2‐pyridylmethyl)amine (TPyA) afford the dinuclear compound fac‐{[FeIII(pzTp)(CN)2(μ‐CN)]CuII(TPA)}·Et2O·ClO4 (1) (pzTp = tetrakis(pyrazolyl)borate). The molecular structure was determined by single‐crystal X‐ray diffraction. In compound 1, the FeIII ion is coordinated by three cyanide carbon atoms and three nitrogen atoms of pzTp anions. Whereas, the CuII ion is surrounded by one cyanide nitrogen atom and four nitrogen atoms from the TPyA ligand. Magnetic measurements indicate the intramolecular ferromagnetic coupling is observed for compound 1, and it has S = 1 ground states.
Neuartige Silane mit sterisch anspruchsvollen Aryl‐Substituenten
Authors: Weidemann Nils , Schnakenburg Gregor , Filippou Alexander C. 
Published: February 2009

AbstractNovel Silanes with Sterically Demanding Aryl SubstituentsA series of novel m‐terphenylsilanes was synthesized and fully characterized. Halogenation of Si(C6H3‐2,6‐Trip2)H3 (1, Trip = C6H2‐2,4,6‐iPr3) with ICl and BI3 afforded the m‐terphenylmonochlorosilane Si(C6H3‐2,6‐Trip2)H2Cl (2) and the m‐terphenyldiiodosilane Si(C6H3‐2,6‐Trip2)HI2 (3), respectively. The chiral phosphanylmethylsilane Si(C6H3‐2,6‐Trip2)HCl(CH2PMe2) (6) was obtained by metathetical exchange of Si(C6H3‐2,6‐Trip2)HCl2 (4) with the Grignard reagent Me2PCH2MgCl (5). Similarly, metathetical exchange of SiBr4 with 0.5 equiv. of {Li(C6H3‐2,6‐Mes)}2 (7) yielded the m‐terphenyltribromsilane Si(C6H3‐2,6‐Mes2)Br3 (8). A Pd(II) catalyzed reaction of MesSiH3 (10) with 2‐iodopropane afforded the triiodosilane MesSiI3 (11) bearing the sterically less demanding mesityl substituent. The silanes were fully characterized and the molecular structures of compounds 2 and 11 were determined by single‐crystal X‐ray diffraction.
Tetrachloroferrate(III) Complexes Containing Some Heteroaromatic Organic Cations: Structures and Magnetic Properties
Authors: James Bruce D. , Mrozinski Jerzy , Klak Julia , Skelton Brian W. , White Allan H. 
Published: February 2009

AbstractThe crystal structures of tetrachloroferrate(III) complexes having stoichiometry (BH)+ [FeCl4]− (where B = isoquinoline and 4‐aminopyridine) were determined at 100 K. While weak interactions, particularly N–H···Cl hydrogen bonds, are evident in the structures, distances between the Fe(III) centers are quite long in both cases. The structure of the compound with B = quinoline was compared with that previously established at room temperature, and showed that neither solid‐solid nor magnetic phase transitions occurred in this temperature range. Magnetic measurements on the paramagnetic powders indicate weak antiferromagnetic interactions transmitted through the crystal lattice, giving rise to Néel temperatures that are significantly below 10 K. Comparisons are made with other characterized [FeCl4]− compounds having similar organic base cations, enabling clarification of the superexchange mechanism.
Supramolecular Complexes Based on [M(CN)8]4– (M = Mo, W) and Aliphatic Amine CuII Tectons
Authors: Dong Wen , Wang Chao , Ouyang Yan , Liao Dai‐Zheng 
Published: February 2009

AbstractThree heterometallic supramolecular complexes [Cu2(pn)4(Mo(CN)8)·4H2O] (pn = diaminopropane) (1), [Cu2(pn)4(W(CN)8)·4H2O] (2) and [Cu2(1,2‐pn)4(H2O) (W(CN)8)·3H2O] (3) have been synthesized and structurally characterized by single‐crystal X‐ray diffraction studies. Complexes 1–3 exhibit three different networks. In 1, the copper(II) ion is pentacoordinate with a distorted square‐pyramidal arrangement and the network is formed by the incorporation of coordinative linkage between the μ2 bridge of [Mo(CN)8]4– and copper(II) ions and hydrogen‐bonding interactions. In 2, the copper(II) ion exhibits a distorted square‐pyramidal arrangement and the network is formed by the hydrogen bonded trinuclear complexesof [Cu2(pn)2(W(CN)8)]. In 3, the copper(II) ions show twodifferent distorted octahedral arrangements. The network structure of 3 is formed by the hydrogen‐bonded complex chains of [Cu2(1,2‐pn)2(W(CN)8)].
Si@Al14(N(Dipp)SiMe3)6: A Si‐Centered Metalloid Aluminum Cluster and the Reinvestigation of Si@Al14Cp*6
Authors: Huber Michael , Hartig Jens , Koch Katharina , Schnöckel Hansgeorg 
Published: February 2009

AbstractThe preparation and X‐ray structure of Si@Al14R6 (R = Cp*, N(Dipp)SiMe3; Dipp = 2,6‐iPr2–C6H3) are described via the disproportionation and substitution reaction of a metastable AlCl solution. One silicon atom occupies the center of an Al8 cube. This central unit is stabilized through capping of six AlR moieties above the faces of the cube. These findings open the door for a reinvestigation of Si@Al14Cp*6 through MALDI, DFT and X‐ray investigations: Caused by the preparation procedure a small part of the Si@Al14Cp*6 clusters are partially oxidized by chlorine and one of the eight aluminum atoms of the cube is substituted by a Si atom: Thus, within the crystal about 1/3 of the SiAl14Cp*6 clusters are Si2Al13Cp*6Cl species causing a more unsymmetrical arrangement of all cluster species than those observed in crystalline SiAl14(N(Dipp)SiMe3)6. The serious problems during the solution of the crystal structure of Si@Al14Cp*6 caused by only slightly modified cluster species may be a strong hint at being careful with the interpretation of any nanoscale species: Even very small modifications (e.g. a single silicon atom i.e. neighbor element of aluminum containing only one more electron and proton substitutes one aluminum atom) cause drastical structural changes and consequently also different e.g. electric properties can be expected.
Infinite and Finite Boron Carbon Branched Chains: The Crystal Structures of New Ternary Boride Carbides RE10B7C10 and RE4B3C4*
Authors: Babizhetskyy Volodymyr , Mattausch Hansjürgen , Simon Arndt 
Published: February 2009

AbstractNew ternary rare earth metal boride carbides RE10B7C10 (RE = Gd, Tb, Dy Ho, Er) and RE4B3C4 (RE = Tb, Dy, Ho, Er, Tm, Yb, Lu) were prepared from the elements by arc‐melting followed by annealing in silica tubes at 1000°C for one month. The crystal structures were investigated by means of single‐crystal X‐ray diffraction data. In the structures of both compounds the boron and carbon atoms form two different types of nonmetal arrangements: one‐dimensional (BC)∞ branched chains and finite CBC units. The branched chains and finite units are differently oriented in both structures. The new ternary rare earth metal boride carbides RE4B3C4 (R = Tb, Dy, Ho, Er, Tm, Yb, Lu) are isotypic to Gd4B3C4, the first characterized member of the rare earth metal borocarbide series in which both one dimentional (BC)∞ branched chains and finite CBC units coexist. Tb10B7C10 is the second characterized member of this family. The compounds RE10B7C10 (RE = Gd, Tb, Dy Ho, Er) are isotypic.
Atomic actions, and their refinements to isolated protocols
Authors: Banach Richard , Schellhorn Gerhard 
Published: February 2009

AbstractInspired by the properties of the refinement development of the Mondex Electronic Purse, we view an isolated atomic action as a family of transitions with a common before-state, and different after-states corresponding to different possible outcomes when the action is attempted. We view a protocol for an atomic action as a computation DAG, each path of which achieves in several steps one of the outcomes of the atomic action. We show that in this picture, the protocol can be viewed as a relational refinement of the atomic action in a number of ways. Firstly, it yields a ‘big diagram’ simulation à la ASM. Secondly, it yields a ‘small diagram’ simulation, in which the atomic action is synchronised with an individual step along each path through the protocol, and all the other steps of the path simulate skip. We show that provided each path through the protocol contains one step synchronised with the atomic action, the choice of synchronisation point can be made freely. We describe the relationship between such synchronisations and forward and backward simulations. We relate this theory to serialisations of system runs containing multiple interleaved transactions, showing how the clean picture of the refinement of an isolated atomic action to an isolated protocol becomes obscured by the details of the interleaving. In effect, the fact that protocols are typically executed by a number of co-operating agents, not all of which embark on executing the protocol at the same moment, results in ‘ragged starts’ and ‘ragged ends’ to protocol instantiations, leading to potential overlaps between unrelated protocol instances that the theory must handle. We show how existing Mondex refinements embody the ideas developed, and describe a mechanical verification of the results presented.
Predicting Properties of Biodiesel Fuels using Mixture Topological Index
Authors: Yuan Hong , Yang Bolun , Yang Jiming 
Published: February 2009

AbstractA new topological index for individual components based on the information of molar mass, bond length and bond energy was established to reflect the molecular structure of fatty acid methyl esters (FAME). Combined with the modified Grunberg–Nissan or Hind equation, the two series mixture topological index values of the biodiesels (mixture of FAME) were calculated, respectively. Some basic properties such as the density, viscosity, flash point (FP), high heating value (HHV) for biodiesel were correlated with these mixture topological indexes to find the relationship of structure and properties. The results show that the topological index can reflect the information of the molecular structure for FAME, such as the size of molecule, unsaturated bond, intensity of bond and branch degree. The modified Grunberg–Nissan equation has a higher precision of predicting for the properties of biodiesel studied than the Hind equation.
Lucan VII 460–465
Authors: Housman A. E. 
Published: February 2009

463 ante 462 VGP et ante corr. ut uidetur U, item adnotator super Lucanum ed. Endtii p. 276 et Statii scholiastes ad Theb. VI 760, qui 462 et 464 coniunctos legerunt.462 ante 463 MZ et ex corr. U.463 quam MZPGV, qua ex corr. U.462 manum VGP, lemma schol. Bern., Statii schol., manus Z et ex corr. U de M non liquet.tempus quo noscere possent VGP et ut uidetur M, adn. sup. Luc, Z (pos), Statii schol. (possint), tempus = q.t.i.r.n.p. lemma schol. Bern., uultusque agnoscere quaerunt ex corr. U, Z2 G2, uultus etiam V2.
The Toledo Ms. of Plutarch's Moralia
Authors: Fletcher G. B. A. 
Published: February 2009

It seems worth while giving some account of this MS., because in recent years it has been said to contain certain pieces of the Moralia which it does not, and not to contain others which it does.At the foot of the first page of the text the MS. carries the pontifical shield with the arms of the Medici, and from this it is reasonable to suppose that there was a time when it belonged either to Leo X., who was Pope from 1513 to 1521, or to Clement VII., who was Pope from 1523 to 1534. This being so, 1534 is established as the terminus ante quem of its writing. Towards the end of this century, about 1598, it was acquired by the Spanish Cardinal Saverio de Zelada. In 1801 the Cardinal Archbishop Antonio de Lorenzana bought in Rome a certain number of Greek and Oriental manuscripts which had formerly been in the collection of Cardinal Saverio de Zelada, and placed them in the Chapter Library at Toledo. Included with these was this MS. of the Moralia, which remains there to this day.
Crater Cratera Creterra
Authors: Clausen Wendell 
Published: February 2009

The article on crater cratera creterra in T.L.L. iv. 1108–10 is imperfect: several examples are omitted and no clear and coherent account of these forms is given.crater appears first in Ennius' Annales (511 Vahl.); and very likely it was Ennius who, finding cratera too ordinary for poetry, transliterated . For several centuries crater remained a poets' word. It may have been introduced into prose by the elder Pliny, who affects poetic vocabulary; in later prose it is found more frequently than either cratera or creter
Virgil's Birthplace Revisited
Authors: Rand E. K. 
Published: February 2009

We may now consider this ancient evidence that Andes lay three miles away from Mantua in connection with Conway's remaining arguments and with Virgil's ‘own statement’ in his Bucolics.In the matter of the inscriptions, Conway's ‘impenitence’ does nothing to strengthen his case. All the points that he raises in an apparent refutation had been met by me. I had distinguished between public and private inscriptions, as Conway had not done in his earlier article, where he declared the period of the two monuments to be ‘Virgil's own,’ the inscriptions being ‘cut in the style which marks the best work between 50 B.C. and A.D. 50.’ I had not, as he asserts, failed to notice the point that caps the climax of his recent article, that ‘the P. Magius who wrote the inscription of Casalpoglio … was related to Virgil's mother.’ I was inclined to date both inscriptions, with the approval of Professor Egbert, somewhere in the third quarter of the first century of our era, but ‘even allowing for them both a date as early as the end of the first century B.C.,’ which is apparently as far back as Conway means to stretch their date, I clamored for an inscription of the time of Virgil's birth if it were to serve as evidence for his birthplace. This point is not met by Conway. If Virgil was born at Pietole, his fame and his family could certainly have extended as far north as Casalpoglio and Calvisano at the time of his death in 19 B.C. Supposing that we knew on other evidence that he was born at Calvisano, the presence of an inscription with the name of Magius or Vergilius would corroborate that evidence.
Propertivs IV. iii. 7 sqq., III. iii. 5
Authors: Cameron A. 
Published: February 2009

Propertivs IV. iii. 7 sqq.:7 Te modo uiderunt iteratos Bactra per ortus,te modo munito Neuricus hostis equo,hibernique Getae, pictoque Britannia curru,10 ustus et Eoa discolor Indus aqua.8 munito Beroaldus, munitus O., Neuricus Jacob, hericus NFL, hernicus D. 10 ustus MSS., uastus Palmer, pastus Otto, tunsus Housman, discolor MSS., decolor Passerat.
The Interpretation of Res Gestae Divi Augusti, 34. 1
Authors: Adcock F. E. 
Published: February 2009

In consulatu sexto et septimo postquam bella civilia exstinxeram per consensum universorum [potitus rerum own]ium rem publicam ex mea potestate in senat[us populique Romani a]rbitrium transtuli.There is very little doubt about the reading of the Latin text, except that the Greek has suggested to Schönbauer that ‘compos’ should be read for ‘potitus’. He urges that ‘compos’ has a ‘milder meaning’ than ‘potitus’ and has no connotation of the use of force. The change to ‘compos’ is worthy of consideration, but suggests that the Latin ran ‘compos factus’ if ‘compos’ was used, and the phrase ‘compos factus’, though good Augustan Latin, is perhaps too retarding in rhythm to fit this place, though to that stylistic feeling too much weight should not be assigned.
Miscellanea: VI. Theognis
Authors: Allen T. W. 
Published: February 2009

οὐδ γρ εδεης νδρ νον οὐδ γυναιπρν πειρηθεης ὥσπερ ποζγου,οὐδ κεν εκσσαις ὥσπερ ποτ’ ς ὥριον λθών.πολλκι γνώμην ξαπατσ’ δαι.ς ὥριον A (Par. suppl.gr. 388), σώριον the rest.
On Some Passages in Lucan Viii
Authors: Postgate J. P. 
Published: February 2009

These lines conclude the speech of Pompey to Cornelia when she met him on the shore of Lesbos after the disaster of Pharsalia. This speech Mr. Heitland in his excellent Introduction to Haskins' Lucan has stigmatised as ‘abominable’.1 So far as the bulk of the speech is concerned a plea may perhaps be urged in mitigation of this judgment. Cornelia has completely broken down at the sight of her unfortunate husband, and his first object should be to restore her to herself. For this purpose, as all, not excluding Lucan, know, a tone of sharp chiding would be most effectual, and we learn from the sequel that it succeeded : ‘uocibus his correpta uiri uix aegra leuauit | membra solo’ (86 sq.). For the crude brutality of the statement in the last four words there is however no excuse. But happily it is not to be charged to Pompey or to Lucan, but to the editions. We should punctuate:quod defies, illud amasti?2. Vv. 155 sqq.tanto deuinxit amorehos pudor hos probitas castique modestia uoltusquod submissa nimis nulli grauis hospita turbaestantis adhuc fati uixit quasi coniuge uicto.
Notes on Plutarch's De Genio Socratis
Authors: Russell D. A. 
Published: February 2009

(1) 583 b = p. 478. 26 Sieveking (Plutarchi Moralia, iii, Leipzig, 1929) …is objectionable. Since Lysis is already dead, cannot here signify ‘beforehand’. Its only other appropriate significance would seem to be ‘publicly, openly’: but also enters into the compound, and can only bear the sense ‘secretly’, which would involve us in a contradiction. so far as I know, does not occur elsewhere: nearly always has the sense ‘give some indication of…’.
The Palatine Manuscript of Thucydides
Authors: Dover K. J. 
Published: February 2009

On this the following observations should be made:1. The sigla ABCEFM are used here as in all editions from Hude onwards, H as in Hude though not universally since, and as in Bartoletti, Per la storia del testo di Tucidide (Firenze, 1938); have not been used before.2. In positing β as ancestor of ABEFHM but not of C I follow Hude, Bartoletti, Stuart Jones, and Powell. I differ from them in leaving out of consideration G (Monac. 228, s. xiii), which is normally considered as descending from a congener of C; since, however, one or more ancestors of G were collated with at least one manuscript related to M and probably with manuscripts of other affinities also, there are clearly no means of deciding whether G is a descendant of C or ultimately independent of C, and I have adopted the economical hypothesis that it is a descendant and must be relegated to the recentiores.
A Transposition in Propertivs
Authors: Housman A. E. 
Published: February 2009

In the ninth elegy of his third book Propertius withstands the encouragements of Maecenas, who has urged him to attempt heroic themes.He declares himself unequal and unsuited to the task: different minds have different aptitudes; Lysippus excels in one craft, Calamis in another; some race afoot and some in chariots;So far his weapons of defence are taken from a common armoury; but in the next verses he develops the argumentum ad hominem which was foreshadowed in ‘eques’ and ‘intra fortunam qui cupis esse tuam.’ Such promptings, says he, come strangely from Maecenas, whose own discreetness and self-repression will be famous in history, and whom he is resolved, so far as in him lies, to imitate.
ἈΑΑΤΟΣ and some other Negative Compounds
Authors: Moorhouse A. C. 
Published: February 2009

It will be seen that has twofold prosodic value: in passage (I) it equals but in the others It is usual to connect the word with Alc, Pind. i.e. Lejeune, Traité de phon. grecque, p. 155note), thus following a lead given by Hesychius This is indeed the only suggestion advanced in the respective etymological dictionaries of Boisacq, Hofmann, and Frisk, and by Seiler (Lex.frühgriech. Epos); though all but Seiler express more or less of doubt, particularly on the ground of meaning.