Is Molecules a Good Journal? Impact Factor, Scope, and Fit Guide

Molecules occupies a specific niche in chemistry publishing. It is not trying to compete with JACS or Angewandte Chemie. It is a venue for complete, well-characterized chemistry research that benefits from open-access visibility and fast turnaround. The papers that work best here are those where the chemistry is sound, the characterization is thorough, and the contribution is clear, but the work does not carry the novelty or significance required by the most selective chemistry journals.

This is an honest position. Not every chemistry paper needs to appear in a top-10 journal, and pretending otherwise leads to years of rejection cycling. Molecules serves researchers who have solid, complete work and want it published, indexed, and citable without a 6-12 month editorial process.

The MDPI reputation concern is real but often overstated. Some hiring committees and grant reviewers view MDPI journals skeptically because of the high-volume model. Others evaluate papers on their individual merit regardless of publisher. The practical advice: if your career depends on selectivity signals (tenure track, competitive grants), a traditional publisher journal at a similar IF may carry more weight even if the science is identical. If your priority is fast, indexed, OA publication of solid work, Molecules does that well.

1. Complete characterization: all new compounds or materials are fully characterized with appropriate analytical data (NMR, HRMS, IR, XRD as applicable)
2. Clear chemical advance: the paper identifies what is new about the chemistry, not just what was done
3. Honest scope: the claims match the data without overstatement or speculative applications
4. Thorough experimental section: procedures are detailed enough for reproduction, including purification methods and yields
5. Appropriate comparison: new compounds or methods are compared against existing approaches rather than presented in isolation

What is the Molecules impact factor?

The 2024 JCR impact factor is 4.2. Molecules ranks Q2 in Chemistry, Multidisciplinary and is one of the largest open-access chemistry journals by volume. Its IF has been stable around 4-5 for several years.

What is the Molecules acceptance rate?

Approximately 35-45%. This is higher than most traditional publisher journals but lower than the broadest MDPI titles. The acceptance rate reflects a journal that maintains peer review standards while publishing a high volume of papers.

Is Molecules a predatory journal?

No. Molecules is indexed in Web of Science, Scopus, PubMed, and other major databases. It has a legitimate JCR impact factor and has been published since 1996. However, like all MDPI journals, it faces perception concerns in some research communities about its high-volume OA model. The journal is legitimate; the reputational question is about selectivity signal, not predatory status.

How fast does Molecules publish?

Molecules typically provides a first editorial decision within 2-3 weeks and publishes accepted papers within 5-8 weeks of submission. This is substantially faster than most traditional chemistry journals and is a genuine advantage when speed matters.

In our pre-submission review work with manuscripts targeting Molecules, three patterns generate the most consistent desk rejections among the papers we analyze.

Incomplete characterization of new compounds or materials. Molecules' editorial guidelines require complete characterization data for all newly reported compounds: NMR (1H and 13C at minimum), HRMS, melting points where applicable, and purity confirmation by HPLC for biologically tested compounds. In our review work, the most common failure at Molecules is manuscripts with incomplete analytical data packages: missing HRMS for key compounds, 13C NMR absent or incomplete, or biological activity reported without purity data. Molecules peer reviewers check characterization data systematically. Papers with analytical gaps are returned for revision or rejected. The characterization must be complete before submission.

Overclaiming significance relative to the data. A persistent pattern: manuscripts that present incremental synthetic work or modest biological activity with language suggesting broader implications than the data support. Molecules accepts solid, complete chemistry that does not need to be field-defining, but the claims must match the evidence. In our analysis, papers that describe a new compound class as "potentially valuable for drug discovery" based on IC50 values from one cell line, or claim "superior activity" based on comparisons with a small subset of existing compounds, receive reviewer feedback about scope and claim calibration. The journal's peer review process is competent and identifies overstatement consistently.

MDPI format non-compliance. Molecules has specific formatting requirements that differ from traditional chemistry journals: manuscript organization, supplementary information structure, graphical abstract format, and data availability statement. In our review work, we observe manuscripts submitted without the required graphical abstract, with supplementary information formatted for a different publisher, or without the mandatory data availability statement. MDPI's editorial office applies formatting checks before peer review, and non-compliant papers are returned for correction before review begins, adding weeks to the timeline.

SciRev author-reported data confirms Molecules' 2-3 week median to first editorial decision and 5-8 week median to publication after acceptance, substantially faster than most traditional chemistry publishers. A Molecules significance framing check can evaluate whether your characterization package and scope framing are ready for Molecules' editorial process.