Structural effects and hydrogen bonds on N,N `-di(methoxycarbonylsulfenyl)urea, [CH(3)OC(O)SNH](2)CO, studied by experimental and theoretical methods

Pure N,N`-di(methoxycarbonylsulfenyl)urea, [CH(3)OC(O)SNH](2)CO, is quantitatively prepared by the hydrolysis reaction of CH(3)OC(O)SNCO and characterized by (1)H NMR, GC-MS and FTIR spectroscopy techniques. Structural and conformational properties are analyzed using a combined approach with data obtained from X-ray diffraction, vibrational spectra and theoretical calculation methods. The IR and Raman spectra for normal and deuterated species are reported. The crystal structure of [CH(3)OC(O)SNH](2)CO was determined by X-ray diffraction methods. The substance crystallizes in the orthorhombic P2(1)2(1)2 space group with a = 9.524(2), b = 12.003(1), c = 4.481 (1) angstrom, and Z = 2 moieties in the unit cell. The molecule is sited on a twofold crystallographic axis (C(2)) parallel to c and shows the anti-anti conformation (S-N single bonds antiperiplanar with respect to the opposite C-N single bonds in sulfenyl-urea-sic group). Neighboring molecules are arranged in a chain motif that extends along the C(2)-axis and is held by bifurcated NH center dot center dot center dot O center dot center dot center dot HN intermolecular bonds. A local planar symmetry is observed in the crystal for the central -SN(H)C(O)N(H)S- skeleton. Experimental and calculated data allow to trace this structural feature to the occurrence of N-H center dot center dot center dot O=C hydrogen bonding interactions. Calculated vibrational and structural properties are in good agreement with the experimentally determined features. (C) 2008 Elsevier B.V. All rights reserved.

Heterodinuclear Fe(III)Zn(II)-Bioinspired Complex Supported on 3-Aminopropyl Silica. Efficient Hydrolysis of Phosphate Diester Bonds

Presented herein is the synthesis and characterization of a new Fe(III)Zn(II) complex containing a Fe(III)-bound phenolate with a carbonyl functional group, which was anchored to 3-aminopropylfunctionalized silica as the solid support. The catalytic efficiency of the immobilized catalyst in the hydrolysis of 2,4-bis (dinitrophenyl) phosphate is comparable to the homogeneous reaction, and the supported catalyst can be reused for subsequent diester hydrolysis reactions.

Investigating the Nature of Noble Gas-Copper Bonds by the Quantum Theory of Atoms in Molecules

We investigated noble gas copper bonds in linear complexes represented by the NgCuX general formula in which Ng and X stand for a noble gas (neon, argon, krypton, or xenon) and a halogen (fluorine, chlorine or bromine), respectively, by coupled cluster methods and modified cc-pVQZ basis sets. The quantum theory of atoms in molecules (QTAIM) shows a linear relation between the dissociation energy or noble gas-copper bonds and the amount of electronic charge transferred mainly from the noble gas to copper during complexation. Large changes in the QTAIM quadrupole moments of copper and noble gases resulting from this bonding and a comparison between NgCuX and NgNaCl systems indicate that these noble gas-copper bonds should be better interpreted as predominantly covalent. Finally, QTAIM atomic dipoles of noble gases in NgNaCl systems agree satisfactorily with atomic dipoles given by a simple model for these NgNa van der Waals bonds.

Mortgages and bonds: the asset management practices of Australian life insurers to 1960

Recent studies of the experience of the British life insurance industry indicate that a period of transition, and the development of more diversified investment strategies, began in the interwar period. Australian life insurers lagged behind their British counterparts in the introduction of such strategies. This paper investigates why this was the case. It argues that in the Australian market there was both a lack of opportunity and incentive to broaden asset portfolios. However, this did not mean that asset management practices did not advance. Australian life offices became progressively more sophisticated in their approach to portfolio management during this period. Developments in the interwar period provided a grounding for post-war expansion into the equity market.

Losing innocence : finding the line between emotional bonds and boundaries in protective service work

This paper builds on existing literature on the notion of emotional labour by investigating work in a child protective service environment. Notable characteristics of formal organisations, such as child protective services, are that they operate within a legal framework and that workers' professional duties have great influence on clients. This paper examines the intricacies of the worker-client relationship and the emotional dynamics of the service interactions by interviewing a group of workers in a public hospital in Victoria, Australia. This research extricates the complexities in the client-worker relationship by examining a range of work characteristics including their roles as professional caregivers, the emotional bonds and boundaries in the workers-client relationship, the intensity and magnitude of felt and displayed emotions, as well as the self-management of emotions and clients' emotions. This study adds to existing knowledge on the emotional expressions, experiences and regulation of emotions of the professional work lives in a child protective service work environment.
This paper is divided into the following sections. The first section details protective service work within the larger framework of human service work, and how the worker-client interface is different from other front-line service work. This is followed the need to examine the emotional dynamics of work in a child protective service organisation. Next, a study of these emotional dynamics in a child protective service organisation is reported. The paper concludes with a consideration of the wider implications for the sociology of protective service work, and how affective issues differ other service work roles.

An exploration of the components of relational bonds to an arts festival brand

This research investigates the nature of the bonds that consumers form with a brand that provides highly uncertain outcomes, and is only available intermittently. The research model draws upon elements of Keller’s (2001) conceptualisation of brand resonance, and extends McAlexander, Kim, and Roberts’ (2003), and Muniz and O’Guinn’s (2001) brand community construct, testing these in an atypical service environment. Qualitative research suggested the need for a broader view of the bond formed in these circumstances, specifically one comprising measures of anticipation of usage, social attraction, commitment, loyalty, and trust. This paper reports on analysis undertaken to develop such a construct, which has been labelled “brand affinity”. Tests for discriminant validity suggest that the brand affinity construct is a distinct construct that can be used to measure consumer attitudes toward a highly uncertain, intermittently available product.

Room-temperature insertion of elemental tellurium into the Cspł-Br and -I bonds of α-bromo-and α-iodopinacolone

Pinacolyltellurium(IV) dihalides, (t-BuCOCH₂)₂TeX₂ (X ) Br (1b), I (1c)) and Ar(t-BuCOCH₂)TeCl₂ (Ar == 1-C₁₀H₇ (Np) (2a), 2,4,6-Me₃C₆H₂ (Mes) (3a)), are readily prepared at room temperature by the oxidative insertion of elemental tellurium into the C_sp³-Br or -I bond of the α-halopinacolone and by the reaction of ArTeCl₃ with the pinacolone t-BuCOCH₃. The bromides Np(t-BuCOCH₂)TeBr₂ (2b) and Mes(t-BuCOCH₂)TeBr₂ (3b) can be prepared by the addition of bromine to the telluride Ar(t-BuCOCH₂)-Te or of α-bromopinacolone to ArTeBr. Variable-temperature ¹H and ¹³C NMR of the separate signals for the o-Me groups in 3a,b indicate a very high barrier to rotation about the Te-C(aryl) bond. Crystal diffraction data for 1c, 2a-c, and 3b show that intramolecular 1,4-Te …O(C) secondary bonding interactions (SBIs) are retained even in the presence of bulky aryl groups and intermolecular Te …X SBIs are subject to electronic population and steric congestion around the Te(IV) center in the solid state.

Announcement effect on the credit spreads of US dollar Malaysian bonds

We find that international political events have more influence on the changes of bond yield spreads from Malaysian USD issues than domestic events. Significant results are consistent across different issues. The resignation by the former Prime Minister, Dr. Mahathir, however created mix response from the market. Using error correction model, this study also found the monetary policy by Federal Reserve have long term and significant impact on the behaviour of the Malaysian USD issues.

Exploring the links between relational bonds and customer loyalty : the case of loyal Arabic guests at five-star hotels

Relationship marketing aims to build and maintain relationships between customers and organizations. While building strong bonds is a key objective of relationship marketing, limited empirical attention has been paid to the role of relational bonds on enhancing loyalty. This study explores the impact of financial, social and structural bonds on consumer loyalty, using a sample of loyal Arabic hotel guests. The results of this study suggest that structural bonds increase loyalty, although financial and social bonds were not found to have a significant impact on loyalty.

Relational bonds and loyalty : the bonds that tie

This paper explores the effect of financial, social and structural bonds on the loyalty of Arabic five star hotel guests. Three different measures of loyalty are used; attitudinal, behavioural and combined to identify how the three relational bonds affect loyalty. The results show that social and structural bonds increase all types of loyalty whereas financial bonds only increase attitudinal and combined loyalty. It is also found that bonds are perceived to be more important for high-loyal consumers as compared to low-loyal consumers. This all suggests that firms seeking to increase loyalty may need different strategies depending on the consumers being targeted.

The roles of social bonds in the Australian tourism network

There is limited published research on the social bonds between employees in two organizations. This paper aims to examine 1) relationships in the Australian tourism industry, 2) the nature and role of social bonds and commercial friendships, 3) the nature and roles of the investments in economic and social resources, and 4) the nature of personal relationships in the tourism network. The perspective and attitudes of the tourism network participants become clear and their vested interests are highlighted. Network pictures are developed for the 5 key sectors of this industry. The adaptations of these sectors are also discussed. The nature and role of social bonds and commercial friendships is examined. The Leximancer program is used to qualitatively analyze interview transcripts. Findings show the centrality of relationships in this industry and the importance of social bonds to the travel agency sector. This study provides additional insight into the nature of social bonds in the development of successful business to business relationships. A discussion of antecedents and outcomes of social bonds will be further developed.

The dynamics of Latin American sovereign international bonds

This thesis investigated the behavioural dynamics of emerging market sovereign international bonds issued by key Latin American economies. The study allows deeper insights into the complex behaviour of an important segment of international bond markets in a single, comprehensive and penetrative study.

Announcement effect on the credit spreads of US dollar Malaysian bonds

The main purpose of this paper is to extend the empirical research on the behavior of credit spreads on the USD denominated Malaysian bonds. We find that international political events have more influence on the changes of bond yield spreads from Malaysian USD issues than domestic events. Significant results are consistent across different issues. However, the resignation by the former Prime Minister, Dr Mahathir Mohamad, created a mixed response from the market. Using an error correction model, this study also found that the monetary policy by the US Federal Reserve has a long-term and significant impact on the behavior of the Malaysian USD issues. This study also provides further evidence that the current theoretical framework is sufficient to explain changes in the credit spread of bonds issued by the emerging market.