Trends in the alkaline-earth amide series: The millimetre-wave spectrum of MgNH<sub>2</sub> and MgND<sub>2</sub> (<sup>2</sup>A<sub>1</sub>)
Bibliographic record
Abstract
The pure rotational spectra of MgNH 2 ([Formula: see text] 2 A 1 ) and its deuterium isotopomer have been recorded using millimetre/sub-millimetre wave direct absorption techniques. Both species were synthesized by the reaction of magnesium vapor and either NH 3 or ND 3 in a dc discharge. Twelve rotational transitions were measured for MgNH 2 , and eight transitions were observed for MgND 2 , both in the range 120530 GHz. Asymmetry components with K a = 05,7, and sometimes 6, were measured for nearly every transition. Rotational, centrifugal distortion, and spinrotation parameters have been accurately determined for both molecules, as well as an r 0 structure for magnesium amide. The data indicate that MgNH 2 is a planar molecule with C 2v symmetry, similar to CaNH 2 and SrNH 2 , and does not undergo inversion. However, there appears to be subtle differences between MgNH 2 and its calcium and strontium analogs. Magnesium amide, for example, has a significantly larger HNH bond angle than CaNH 2 and SrNH 2 . In addition, the spinrotation constants indicate slightly more in-plane p character for the unpaired electron in this molecule relative to that in calcium or strontium amide. Such differences may result from more covalent character in the bonding of MgNH 2 in comparison to the heavier alkaline-earth amide species. PACS No.: 32.20Bx
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".