The Crystal Structure of Pyridinium μ-salicylato-tetrachloro-μ- oxo-μ-ethoxo-dioxodimolibdate(V)

The crystal structure of the title complex has been determined from diffractometer X-ray intensity data by means of Patterson · and Fourier methods and refined by the full matrix least-squares technique to an R index of 0.060 (Rw = 0.064). The crystals are built up of pyH+ cations and [Mo20sCl4 (C2HsO) (HOC6H4C02)J2- anions. Each molybdenum atom of the binuclear anion is octahedrally coordinated, being bonded to two oxo-oxygen atoms, one terminal (1.669 and 1.670 A) and one bridging (1.908 and 1.916 A), one bridging ethoxo-oxygen atom (1.963 and 1.964 A), one salicylato- oxygen atom (2.295 and 2.317 A) and two chlorine atoms (from 2.399 to 2.432 A). The terminal oxo-oxygens occupy a cis- position with respect to the Mo20 2 bridge. The dihedral angle between the two Mo02 planes within the bridge amounts to 164.9°. The Mo-Mo bond lengths is 2.646A

The Crystal Structure of Pyridinium μ-salicylato-tetrachloro-μ- oxo-μ-ethoxo-dioxodimolibdate(V)

The crystal structure of the title complex has been determined from diffractometer X-ray intensity data by means of Patterson · and Fourier methods and refined by the full matrix least-squares technique to an R index of 0.060 (Rw = 0.064). The crystals are built up of pyH+ cations and [Mo20sCl4 (C2HsO) (HOC6H4C02)J2- anions. Each molybdenum atom of the binuclear anion is octahedrally coordinated, being bonded to two oxo-oxygen atoms, one terminal (1.669 and 1.670 A) and one bridging (1.908 and 1.916 A), one bridging ethoxo-oxygen atom (1.963 and 1.964 A), one salicylato- oxygen atom (2.295 and 2.317 A) and two chlorine atoms (from 2.399 to 2.432 A). The terminal oxo-oxygens occupy a cis- position with respect to the Mo20 2 bridge. The dihedral angle between the two Mo02 planes within the bridge amounts to 164.9°. The Mo-Mo bond lengths is 2.646A

The Crystal Structure of Phenylmercury(II) Trifluoroacetate and the Refinement of the Crystal Structure of Phenylmercury (II) Acetate

The crystal structure o•f phenylmercury(I!) trifluoroace·tate (A) has been determined by the heavy-atom method using diffractometer X-ray diffraction data and refined by the least- squa.res procedure to the conventiona.l R index o.f 0.051. The structure of phenylrrnercury(II) aceta.te (B) has also been redetermined and refined also with diffractometer data in order to obtain better values for bond lengths and angles and to compare them w.ith those of CA). For (B) .the refdnement converged at an R index of 0.069. Both compounds, CA) and (B) , have essentially the same molecuLar structure: characteristic coordination of mercury is digonal witih ·almost co1\u27linear C-Hg-0 bonds. In both structures the angles at the Hg atoms are identical and amount to 176.6°. The Hg-C and Hg-0 bond lengths are 205.l and 212.1 pm in (A) , and 203.8 and 208.4 pm in (B) , respec,tively. The effective cooi\u27dination number of mercury in both structures is four: the mercury atoms, apart from being bonded to the phenyl-carbon and tri.fluoroacetato or acetato- oxygen atoms, are addition:a:lly sunounded in (A) by two trifluoroacetato- oxygen a.toms, in (B) by two acetato-oxygen atoms. The Hg .. . 0 distances vary frnm 281.9 to 295.2 pm

Quality of Life in Psoriatic Patients and the Relationship between Type I and Type II Psoriasis

Psoriatic patients, along with skin changes, frequently show various psychological changes such as depression, anxiety and have overall lower quality of life. The aim of this study was to evaluate the quality of life in patients with psoriasis compared to other dermatological patients, as well as to investigate the differences between the two subgroups – type I and type II psoriasis. A total of 94 dermatological patients were included. The patients were divided into two groups, the first group made of psoriatic patients which was further divided into two subgroups, and the second, control group made of patients with other skin diseases. DSQL quality of life questionnaire was used. The study showed that among psoriatic patients there was no significant difference in the quality of life, but there was a significant difference between the psoriasis type I and the control group, which could be explained by the strong influence of the disease on the quality of life in psoriatic patients

Synthesis of Two Novel Tetranuclear Molybdenum(V) Complexes. Crystal Structure of Hexa-μ-propionato-dichlorodi-μ3-oxotetraoxotetramolybdenum(V)

In the reaction of MoO2Cl2 and MoO22Br2 with propionic anhydride, new complexes of molybdenum(V), and Mo4O6Br2(OCOC2H5)6, respectively, have been prepared. The crystal structure of the former was determined from single crystal diffractometer data and refined to the final R value of 0.046. The complex crystallizes in the monoclinic space group P2!n with cell dimensions a = 11.713(2) Å, b = 9.292(3) Å, c = 30.957(6) Å, f = 96.71(2)°, Z)caic = 1.963 g cm-3, Z = 4. The tetranuclear complex molecule contains four molybdenum atoms bridged through two oxo- oxygen atoms and six bidentate propionato-ligands. Two of the four molybdenum atoms form a Mo-Mo bond at 2.592(3) A

Knowledge and Attitudes towards Sun Protection in Croatia

Skin cancer is the most common form of cancer; the World Health Organization estimates that more than 2 million cases of skin cancer are being diagnosed each year worldwide. Excessive sun exposure and ultraviolet (UV) radiation are the major avoidable risk factors for skin cancer, including melanoma. Sun protection can be achieved through behavioral modification, social changes and environmental changes: regular use of sunscreen, wearing hats and protective clothes, staying in the shade, creating shade by planting trees or constructing canopies, practicing work and sport activities during the time of the day when the sun is not the strongest and many others. The aim of this paper was to investigate the knowledge and attitudes about sun protection and sun behavior patterns in Croatia, as well as the perception of melanoma among general population. Our results indicate relatively good sun behavior patterns among our participants and their mostly correct perception of melanoma

Psychological Impact of Isotretinoin Treatment in Patients with Moderate and Severe Acne

Acne patients are subject to different degree of psychosocial distress. The emotional impact of acne vulgaris due to disfigurement caused by the disease is undisputed. Most common reactions to the acne are depression and anxiety. The use of isotretinoin, one of the most effective options in acne treatment, increases depression symptoms. The aim of this study was to investigate the psychological status of the patients with moderate to severe acne and to compare patients treated with isotretinoin with patients treated with vitamin C. A total of 85 patients suffering from acne vulgaris were included in the study. The results of this study do not find a significant correlation between the use of isotretinoin and the psychological effects of the drug

Synthesis of Two Novel Tetranuclear Molybdenum(V) Complexes. Crystal Structure of Hexa-μ-propionato-dichlorodi-μ3-oxotetraoxotetramolybdenum(V)

In the reaction of MoO2Cl2 and MoO22Br2 with propionic anhydride, new complexes of molybdenum(V), and Mo4O6Br2(OCOC2H5)6, respectively, have been prepared. The crystal structure of the former was determined from single crystal diffractometer data and refined to the final R value of 0.046. The complex crystallizes in the monoclinic space group P2!n with cell dimensions a = 11.713(2) Å, b = 9.292(3) Å, c = 30.957(6) Å, f = 96.71(2)°, Z)caic = 1.963 g cm-3, Z = 4. The tetranuclear complex molecule contains four molybdenum atoms bridged through two oxo- oxygen atoms and six bidentate propionato-ligands. Two of the four molybdenum atoms form a Mo-Mo bond at 2.592(3) A