SYNTHESIS AND CRYSTAL-STRUCTURE OF NEODYMIUM COMPLEX OF 1-METHYL-1, 4, 7, 10-TETRAAZACYCLODODECANE

The complex [Nd(L)(CH3CN)(CF3SO3)3] has been synthesized. Where L = 1-methyl-1, 4, 7, 10-tetraazacycldodecane. The crystal structure of the complex has been determined by a four-circle X-ray diffractometer to a final deviation factor B value of 0.0370 and R(w) value of 0.0385 respectively. The crystal is triclinic system, space group P1BAR with a = 0.8738(2), b = 1.2870(3), c = 1.2900(3) nm, alpha = 85.63(2), beta = 87.25(2), gamma = 78.30(2)-degrees, V = 1.41571 (60) nm3, Z = 2, D(c) = 1.92 g/cm3. The neodymium ion is eight-coordinated to forming a distorted square antiprism.

1-甲基-1,4,7,10-四氮杂环十二烷镧配合物的合成及晶体结构

合成了1-甲基-1,4,7,10-四氮杂环十二烷(L)配体。在乙腈中培养了La(L)(CH_3CN)-(H_2O)(CF_3SO_3)_3配合物单晶,测定了其红外光谱和质子核磁共振谱。用X射线衍射方法测定了配合物的晶体结构,该晶体属于单斜晶系,P2_1/n空间群,a=0.9700(2)nm,b=1.5966(2)nm,c=1.9085(1)nm,β=104.71(3)°,V=2.8588(50)nm~3。配合物中镧为9配位,其配位多面体为扭曲的单帽四方反棱柱体。

Unprecedented 5,5-connected (4(7)center dot 6(3)) (4(8)center dot 6(2)) structural topology: A lead biphosphonate with double layered structure

A new lead(II) phosphonate, Pb[(PO3)(2)C(OH)CH3]center dot H2O (1) was hydrothermally synthesized and characterized by IR, elemental analysis, UV, TGA, SEM, and single crystal X-ray diffraction analysis. X-ray crystallographic study showed that complex 1 has a two-dimensional double layered hybrid structure containing interconnected 4- and 12-membered rings and shows an unusual (5,5)-connected (4(7) . 6(3)) (4(8) .6(2)) topology. (C) 2008 Elsevier B.V. All rights reserved.

从看图讲故事看4-7岁儿童创造力的发展及其入学突降现象

创造力发展的年龄特征一直是研究者非常关注的问题。很多研究者认为，只有更全面地探查儿童创造力的发展，才能充分了解创造力的本质，所以，应该在多个领域中研究创造力。本研究以文学领域中儿童比较熟悉并喜欢的讲故事的形式，采用同感评估技术（CAT），对4-7岁儿童的创造力发展趋势进行了研究，并深入探讨了经常被人们提到的出现在该阶段中的“入学突降”现象。研究共分为两个部分：研究一考察了4-7岁儿童创造力的发展趋势和创造力的“入学突降”现象；研究二探查了讲故事任务的创造力与言语能力的关系，讨论了创造力的领域特殊性。研究结果发现： 1. 4-7岁儿童的创造力随年龄的增长总体上表现出先上升后下降的趋势，并且存在性别差异。性别差异的具体表现为，女生在4-5岁的发展快于男生，且在6岁开始出现下降趋势。 2. 排除入学影响，随年龄增长，6-7岁儿童的创造力显著上升。 3. 6岁已入学儿童的创造力显著低于同年龄未入学儿童，其中女生受到的影响更大。 4. 言语能力是讲故事创造力的基础，只有达到了一定水平的言语能力才能够表现出较高水平的创造力，但是言语能力只是讲故事创造力的必要而非充分条件。 5. 研究结果部分支持了创造力领域特殊性的理论。

Innovative qualitative research methods with children aged 4-7 years

There is a growing body of knowledge that uses innovative qualitative methods to support and facilitate the involvement of young children, aged 7 years and under, in the research process. Across several fields of study the recent growth in research that engages with young children stands in sharp contrast with the situation just a few years ago where there was a dearth of activity and knowledge in this area. Designed to seek their views, experiences and perspectives the range of methods is now burgeoning. This chapter explores reasons for the growth in the use of innovative qualitative methods, the underlying principles through which the engagement of young children has been achieved and the different types of method with detailed case examples. For each method the main critical issues regarding their effectiveness are identified and discussed in further detail. The latter sections of the chapter focus on contemporary issues regarding the use of innovative methods. Highlighted, in particular, are some of the common concerns and criticisms with regards to the trustworthiness, reliability, validity and generalizability of the data that is collated using innovative qualitative methods.

Bis(1,4,7-trithiacyclononane-S,S ',S '')nickel(II) dibromide tetrahydrate

The Ni-II centre in the cation of the title compound, [Ni(C6H12S3)(2)]Br-2. 4H(2)O, occupies a crystallographic inversion centre and is octahedrally coordinated by six S-donors from two [9]aneS(3) ligands. Ni-S distances range from 2.3749 (16) to 2.4077 (15) Angstrom and S-Ni-S angles where both thia donors belong to the same ligand lie in a narrow range between 88.09 (5) and 88.67 (6)degrees. The water molecules participate in extensive hydrogen bonding with each other and with the Br- anions to form double chains with eight- and 12-membered hydrogen-bonded rings running along the crystallographic a direction.

Collection des cartulaires de France ; 4-7. Cartulaire de l'église Notre-Dame de Paris. Série 1,Tome 2 / publ. par M. Guérard,... ; avec la collab. de MM. Géraud, Marion et Deloye

[Cartulaire. Paris, Cathédrale Notre-Dame. 1850]

Collection des cartulaires de France ; 4-7. Cartulaire de l'église Notre-Dame de Paris. Tome 4,Tome 1,Tome 4 / publ. par M. Guérard,... ; avec la collab. de MM. Géraud, Marion et Deloye

[Cartulaire. Paris, Cathédrale Notre-Dame. 1850]

4/7/20, Independence day [jardin des Tuileries, tribune officielle] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59902

4/7/20, Independence day [jardin des Tuileries, tribune officielle] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59904

[Le lanceur de javelot Pierre] Grany [Colombes, 4/7/20, championnats de Paris d'athlétisme] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59924

[Le sprinter René] Lorain [Colombes, 4/7/20, championnats de Paris d'athlétisme] : [photographie de presse] / [Agence Rol]

Référence bibliographique : Rol, 59925