Divalent europium and ytterbium complexes supported by a bulky 2-pyridyl amido ligand: synthesis, structure and reactivity studies.

Metallation of the N-arylated 2-pyridyl amine [HN(C6H3Pr(i)2-2,6)(2-C5H3N-6-Me)] (1) with potassium hydride in Et2O and THF yielded potassium amides [{KL(OEt2)}2] [L = N(C6H3Pr(i)2-2,6)(2-C5H3N-6-Me)] (2) and KL(THF)2 (3), respectively. Treatment of LnI2(THF)2 (Ln = Eu, Yb) with 2 afforded the corresponding Ln(II) amido complexes [EuL(μ-L)2K(THF)] (4) and [YbL2(THF)2] (5). In contrast, an analogous reaction of SmI2(THF)2 with 2 only led to the isolation of homoleptic Sm(III) triamide [SmL3] (6).

A youth-focused case management intervention to engage and retain young gay men of color in HIV care.

HIV-positive Latino and African-American young men who have sex with men (YMSM) have low rates of engagement and retention in HIV care. An evaluation of a youth-focused case management intervention (YCM) designed to improve retention in HIV care is presented. HIV-positive Latino and African-American YMSM, ages 18-24, who were newly diagnosed with HIV or in intermittent HIV care, were enrolled into a psychosocial case management intervention administered by Bachelor-level peer case managers at two HIV clinics in Los Angeles County, California.

Integrating professional and folk models of HIV risk: YMSM's perceptions of high-risk sex.

Risks associated with HIV are well documented in research literature. Although a great deal has been written about high-risk sex, little research has been conducted to examine how young men who have sex with men (YMSM) perceive and define high-risk sexual behavior. In this study, we compare the "professional" and "folk" models of HIV risk based on YMSM's understanding of high-risk sex and where and how they gathered their understanding of HIV risk behaviors.